Fix pylint warnings for "unnecessary not"

Fix boolean expressions that creates an unnecessary negation.

Change-Id: Ib17693a426107949488b920a19fa3d13398ee897
Signed-off-by: Chuck Short <chucks@redhat.com>

.pylintrc

@@ -144,7 +144,6 @@ disable=
  unused-variable,
  len-as-condition,
  cell-var-from-loop,
- unneeded-not,
  singleton-comparison,
  misplaced-comparison-constant,
  unidiomatic-typecheck,

cinder/cmd/volume_usage_audit.py

@@ -81,7 +81,7 @@ def _time_error(LOG, begin, end):
                                          "%Y-%m-%d %H:%M:%S")
     begin = begin.replace(tzinfo=iso8601.UTC)
     end = end.replace(tzinfo=iso8601.UTC)
-    if not end > begin:
+    if end <= begin:
         msg = _("The end time (%(end)s) must be after the start "
                 "time (%(start)s).") % {'start': begin,
                                         'end': end}

cinder/volume/drivers/datera/datera_api2.py

@@ -675,7 +675,7 @@ class DateraApi(object):
         TIMEOUT = 10
         retry = 0
         poll = True
-        while poll and not retry >= TIMEOUT:
+        while poll and retry < TIMEOUT:
             retry += 1
             snap = self._issue_api_request(url, api_version='2')
             if snap['op_state'] == 'available':
@@ -695,7 +695,7 @@ class DateraApi(object):
             policies['default_storage_name']).format(
                 datc._get_name(volume['id']))
         poll = True
-        while poll and not retry >= TIMEOUT:
+        while poll and retry < TIMEOUT:
             retry += 1
             si = self._issue_api_request(check_url, api_version='2')
             if si['op_state'] == 'available':

cinder/volume/drivers/datera/datera_api21.py

@@ -800,7 +800,7 @@ class DateraApi(object):
         TIMEOUT = 20
         retry = 0
         poll = True
-        while poll and not retry >= TIMEOUT:
+        while poll and retry < TIMEOUT:
             retry += 1
             snap = self._issue_api_request(url,
                                            api_version='2.1',
@@ -822,7 +822,7 @@ class DateraApi(object):
             policies['default_storage_name']).format(
                 datc._get_name(volume['id']))
         poll = True
-        while poll and not retry >= TIMEOUT:
+        while poll and retry < TIMEOUT:
             retry += 1
             si = self._issue_api_request(check_url,
                                          api_version='2.1',

cinder/volume/drivers/hpe/hpe_3par_iscsi.py

@@ -199,7 +199,7 @@ class HPE3PARISCSIDriver(hpebasedriver.HPE3PARDriverBase):
                         "target_ip_address '%s.'",
                         (", ".join(temp_iscsi_ip)))
 
-        if not len(iscsi_ip_list) > 0:
+        if not len(iscsi_ip_list):
             msg = _('At least one valid iSCSI IP address must be set.')
             LOG.error(msg)
             raise exception.InvalidInput(reason=msg)

cinder/volume/drivers/ibm/flashsystem_common.py

@@ -481,7 +481,7 @@ class FlashSystemDriver(san.SanDriver,
         # Get storage system name and id
         ssh_cmd = ['svcinfo', 'lssystem', '-delim', '!']
         attributes = self._execute_command_and_parse_attributes(ssh_cmd)
-        if not attributes or not ('name' in attributes):
+        if not attributes or ('name' not in attributes):
             msg = _('Could not get system name.')
             LOG.error(msg)
             raise exception.VolumeBackendAPIException(data=msg)
@@ -490,7 +490,7 @@ class FlashSystemDriver(san.SanDriver,
 
         # Validate value of open_access_enabled flag, for now only
         # support when open_access_enabled is off
-        if not attributes or not ('open_access_enabled' in attributes) or (
+        if not attributes or ('open_access_enabled' not in attributes) or (
                 attributes['open_access_enabled'] != 'off'):
             msg = _('open_access_enabled is not off.')
             LOG.error(msg)
@@ -504,7 +504,7 @@ class FlashSystemDriver(san.SanDriver,
             msg = _('Unable to parse attributes.')
             LOG.error(msg)
             raise exception.InvalidInput(reason=msg)
-        if not ('status' in attributes) or (
+        if ('status' not in attributes) or (
                 attributes['status'] == 'offline'):
             msg = (_('Array does not exist or is offline. '
                      'Current status of array is %s.')

cinder/volume/drivers/ibm/gpfs.py

@@ -445,7 +445,7 @@ class GPFSDriver(driver.CloneableImageVD,
             raise exception.VolumeBackendAPIException(data=msg)
 
         _gpfs_cluster_release_level = self._get_gpfs_cluster_release_level()
-        if not _gpfs_cluster_release_level >= GPFS_CLONE_MIN_RELEASE:
+        if _gpfs_cluster_release_level < GPFS_CLONE_MIN_RELEASE:
             msg = (_('Downlevel GPFS Cluster Detected.  GPFS Clone feature '
                      'not enabled in cluster daemon level %(cur)s - must '
                      'be at least at level %(min)s.') %
@@ -474,7 +474,7 @@ class GPFSDriver(driver.CloneableImageVD,
 
             filesystem, fslevel = \
                 self._get_gpfs_fs_release_level(directory)
-            if not fslevel >= GPFS_CLONE_MIN_RELEASE:
+            if fslevel < GPFS_CLONE_MIN_RELEASE:
                 msg = (_('The GPFS filesystem %(fs)s is not at the required '
                          'release level.  Current level is %(cur)s, must be '
                          'at least %(min)s.') %

cinder/volume/drivers/vmware/vmdk.py

@@ -2008,7 +2008,7 @@ class VMwareVcVmdkDriver(driver.VolumeDriver):
         host = None
         rp = None
         folder = None
-        if not clone_type == volumeops.LINKED_CLONE_TYPE:
+        if clone_type != volumeops.LINKED_CLONE_TYPE:
             # Pick a datastore where to create the full clone under any host
             (host, rp, folder, summary) = self._select_ds_for_volume(volume)
             datastore = summary.datastore