Change a parameter key for CIFS mounting command

While Huawei driver mounting CIFS filesystem, the username parameter
key passed to the mount command is by the form of "user=***", which's
compatible as "username=***" in Ubuntu. However, for some other
systems, such as Redhat, it is not valid.

This patch changes it to the more compatible form "username=***".

Change-Id: Ifa2ca7bcdceef2d47e2841a27ddf51d86f1ef63c
Closes-Bug: #1740816

manila/share/drivers/huawei/v3/connection.py

@@ -601,7 +601,7 @@ class V3StorageConnection(driver.HuaweiBase):
                           share['mount_src'])
 
             elif share['share_proto'] == 'CIFS':
-                user = ('user=' + access['access_to'] + ',' +
+                user = ('username=' + access['access_to'] + ',' +
                         'password=' + access['access_password'])
                 utils.execute('mount', '-t', 'cifs',
                               share['mount_path'], share['mount_src'],

manila/tests/share/drivers/huawei/test_huawei_nas.py

@@ -4600,6 +4600,30 @@ class HuaweiShareDriverTestCase(test.TestCase):
                           self.driver.revert_to_snapshot,
                           None, snapshot, None, None)
 
+    @ddt.data({'name': 'fake_name',
+               'share_proto': 'NFS',
+               'mount_path': 'fake_nfs_mount_path',
+               'mount_src': '/mnt/test'},
+              {'name': 'fake_name',
+               'share_proto': 'CIFS',
+               'mount_path': 'fake_cifs_mount_path',
+               'mount_src': '/mnt/test'},
+              )
+    def test_mount_share_to_host(self, share):
+        access = {'access_to': 'cifs_user',
+                  'access_password': 'cifs_password'}
+        mocker = self.mock_object(utils, 'execute')
+        self.driver.plugin.mount_share_to_host(share, access)
+        if share['share_proto'] == 'NFS':
+            mocker.assert_called_once_with(
+                'mount', '-t', 'nfs', 'fake_nfs_mount_path', '/mnt/test',
+                run_as_root=True)
+        else:
+            mocker.assert_called_once_with(
+                'mount', '-t', 'cifs', 'fake_cifs_mount_path', '/mnt/test',
+                '-o', 'username=cifs_user,password=cifs_password',
+                run_as_root=True)
+
 
 @ddt.ddt
 class HuaweiDriverHelperTestCase(test.TestCase):

releasenotes/notes/fix-huawei-driver-cifs-mount-issue-2d7bff5a7e6e3ad6.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Change the CIFS mounting parameter of Huawei driver from form "user=" to
+    "username=", which is compatible in various OS.