Fix Sanity failures in stable-2.4

plugins/modules/helm_info.py

@@ -52,6 +52,7 @@ options:
       - If set to C(uninstalling), show releases that are currently being uninstalled.
     type: list
     elements: str
+    default: []
     version_added: "2.3.0"
   get_all_values:
     description:

plugins/modules/helm_template.py

@@ -98,6 +98,7 @@ options:
     required: false
     type: list
     elements: str
+    default: []
     version_added: 2.4.0
   values_files:
     description:

plugins/modules/k8s_drain.py

@@ -46,6 +46,7 @@ options:
     description:
       - Specify options to delete pods.
       - This option has effect only when C(state) is set to I(drain).
+    default: {}
     suboptions:
         terminate_grace_period:
             description:

plugins/modules/k8s_info.py

@@ -38,10 +38,12 @@ options:
     description: List of label selectors to use to filter results
     type: list
     elements: str
+    default: []
   field_selectors:
     description: List of field selectors to use to filter results
     type: list
     elements: str
+    default: []
 
 extends_documentation_fragment:
   - kubernetes.core.k8s_auth_options

plugins/modules/k8s_log.py

@@ -47,6 +47,7 @@ options:
     - Only one of I(name) or I(label_selectors) may be provided.
     type: list
     elements: str
+    default: []
   container:
     description:
     - Use to specify the container within a pod to grab the log from.

plugins/modules/k8s_rollback.py

@@ -24,10 +24,12 @@ options:
     description: List of label selectors to use to filter results.
     type: list
     elements: str
+    default: []
   field_selectors:
     description: List of field selectors to use to filter results.
     type: list
     elements: str
+    default: []
 extends_documentation_fragment:
   - kubernetes.core.k8s_auth_options
   - kubernetes.core.k8s_name_options

plugins/modules/k8s_scale.py

@@ -36,6 +36,7 @@ options:
     description: List of label selectors to use to filter results.
     type: list
     elements: str
+    default: []
     version_added: 2.0.0
   continue_on_error:
     description: