Fix ansible-lint issues for newest version

Change-Id: I8238b5d5e49c2a4a8ed3228de23349092c9e1220
Signed-off-by: Sagi Shnaidman <sshnaidm@redhat.com>

plugins/modules/address_scope.py

@@ -30,7 +30,7 @@ options:
    ip_version:
      description:
         - The IP version of the subnet 4 or 6
-     default: 4
+     default: '4'
      type: str
      choices: ['4', '6']
    shared:

plugins/modules/image.py

@@ -61,7 +61,7 @@ options:
      description:
         - Prevent image from being deleted
      type: bool
-     default: 'no'
+     default: false
    filename:
      description:
         - The path to the file which has to be uploaded

plugins/modules/lb_health_monitor.py

@@ -45,7 +45,7 @@ options:
         - The number of successful checks before changing the operating status of the member to ONLINE.
    max_retries_down:
      type: 'str'
-     default: 3
+     default: '3'
      description:
         - The number of allowed check failures before changing the operating status of the member to ERROR. A valid value is from 1 to 10. The default is 3.
    resp_timeout:
@@ -60,7 +60,7 @@ options:
      type: bool
    expected_codes:
      type: 'str'
-     default: 200
+     default: '200'
      description:
       - The list of HTTP status codes expected in response from the member to declare it healthy. Specify one of the following values
         A single value, such as 200

plugins/modules/routers_info.py

@@ -49,6 +49,7 @@ options:
          description:
            - A list of tags to filter the list result by. Resources that match all tags in this list will be returned.
          type: list
+         elements: str
 requirements:
     - "python >= 3.6"
     - "openstacksdk"

plugins/modules/subnet.py

@@ -39,7 +39,7 @@ options:
    ip_version:
      description:
         - The IP version of the subnet 4 or 6
-     default: 4
+     default: '4'
      type: str
      choices: ['4', '6']
    enable_dhcp: