Fix up nfv tox targets for python3

basepython for tox.ini in nfv is not specified
so it varies when running on different zuul machines.

This fixes bandit (which is not enabled in zuul) to use
alternative path declaration for excluded folders.
See: https://github.com/PyCQA/bandit/issues/400

This fixes pylint when run in python3 since the
suppression syntax is different in both versions
(pylint: disable) vs (pylint disable)
https://github.com/PyCQA/pylint/issues/986

This fixes a stricter check that was introduced by
pylint 2.4.3 (released Oct 19, 2019) related to
abs.abstractproperty
https://github.com/PyCQA/pylint/issues/3150

Change-Id: I3718229d6d0e6074cf10347e6c6cb40fb26c25db
Signed-off-by: Al Bailey <Al.Bailey@windriver.com>

nfv/nfv-vim/nfv_vim/nfvi/api/v1/_nfvi_sw_mgmt_api.py

@@ -40,28 +40,28 @@ class NFVISwMgmtAPI(object):
         """
         pass
 
-    @abc.abstractproperty
+    @abc.abstractmethod
     def query_updates(self, future, callback):
         """
         Query software updates using the plugin
         """
         pass
 
-    @abc.abstractproperty
+    @abc.abstractmethod
     def query_hosts(self, future, callback):
         """
         Query hosts using the plugin
         """
         pass
 
-    @abc.abstractproperty
+    @abc.abstractmethod
     def update_host(self, future, host_name, callback):
         """
         Apply a software update to a host using the plugin
         """
         pass
 
-    @abc.abstractproperty
+    @abc.abstractmethod
     def update_hosts(self, future, host_names, callback):
         """
         Apply a software update to a list of hosts using the plugin

nfv/pylint.rc

@@ -46,7 +46,8 @@ load-plugins=
 # W0706: The except handler raises immediately (try-except-raise)
 # W1401 anomalous-backslash-in-string
 # W1505: Using deprecated method getargspec() (deprecated-method)
-disable=C, R, W0120, W0125, W0212, W0221, W0223, W0231, W0235,
+# E0012: pylint for python3 does not support inline deprecation
+disable=C, R, E0012, W0120, W0125, W0212, W0221, W0223, W0231, W0235,
     W0401, W0404, W0511, W0603, W0612, W0613, W0621, W0622, W0703, W1401,
     W0107, W0706, W1505
 

nfv/tox.ini

@@ -114,7 +114,8 @@ commands = pylint {[nfv]nfv_client_src_dir}  \
 # B310: Audit url open for permitted schemes
 # B506: Test for use of yaml load
 skips = B104,B108,B110,B310,B506
-exclude = nfv-docs,nfv-tests,nfv-debug-tools,unit_test
+exclude = ./nfv-docs,./nfv-tests,./nfv-debug-tools,unit_test
+
 
 [testenv:bandit]
 deps = {[nfv]deps}