Fix filtering azure inventory based on user-specified tags

Users can specify a list of keys, or a list of key:value pairs under
source variables. e.g. tags: Creator, peanutbutter or tags:
Creator:jmarshall, peanutbutter:jelly. If provided, only hosts that have
all keys or key:value pairs in the list will be returned.

inventory.py sets up the azure_rm.yml that provides
exclude_host_filters. This code adds a line for each key in the list, as
well as an additional line in the case of a key:value pair.

e.g.

exclude_host_filters:
- "'Creator' not in tags.keys()"
- tags['Creator'] != 'jmarshall'

Each line is a conditional, and if any conditionals is true, then the
host is filtered out.

fix for issue # 5044

awx/main/models/inventory.py

@@ -2036,9 +2036,25 @@ class azure_rm(PluginFileInjector):
         for key, loc in old_filterables:
             value = source_vars.get(key, None)
             if value and isinstance(value, str):
-                user_filters.append('{} not in {}'.format(
-                    loc, value.split(',')
-                ))
+                # tags can be list of key:value pairs
+                #  e.g. 'Creator:jmarshall, peanutbutter:jelly'
+                # or tags can be a list of keys
+                #  e.g. 'Creator, peanutbutter'
+                if key == "tags":
+                    # grab each key value pair
+                    for kvpair in value.split(','):
+                        # split into key and value
+                        kv = kvpair.split(':')
+                        # filter out any host that does not have key
+                        # in their tags.keys() variable
+                        user_filters.append('"{}" not in tags.keys()'.format(kv[0].strip()))
+                        # if a value is provided, check that the key:value pair matches
+                        if len(kv) > 1:
+                            user_filters.append('tags["{}"] != "{}"'.format(kv[0].strip(), kv[1].strip()))
+                else:
+                    user_filters.append('{} not in {}'.format(
+                        loc, value.split(',')
+                    ))
         if user_filters:
             ret.setdefault('exclude_host_filters', [])
             ret['exclude_host_filters'].extend(user_filters)