[PR #8624/37c85605 backport][stable-9] Type options of cache plugins (#8686)

Type options of cache plugins (#8624)

* Type options of cache plugins.

* Do not change type of _timeout for now.

(cherry picked from commit 37c8560542)

Co-authored-by: Felix Fontein <felix@fontein.de>

plugins/cache/redis.py

@@ -21,6 +21,7 @@ DOCUMENTATION = '''
           - The format is V(host:port:db:password), for example V(localhost:6379:0:changeme).
           - To use encryption in transit, prefix the connection with V(tls://), as in V(tls://localhost:6379:0:changeme).
           - To use redis sentinel, use separator V(;), for example V(localhost:26379;localhost:26379;0:changeme). Requires redis>=2.9.0.
+        type: string
         required: true
         env:
           - name: ANSIBLE_CACHE_PLUGIN_CONNECTION
@@ -29,6 +30,7 @@ DOCUMENTATION = '''
             section: defaults
       _prefix:
         description: User defined prefix to use when creating the DB entries
+        type: string
         default: ansible_facts
         env:
           - name: ANSIBLE_CACHE_PLUGIN_PREFIX
@@ -37,6 +39,7 @@ DOCUMENTATION = '''
             section: defaults
       _keyset_name:
         description: User defined name for cache keyset name.
+        type: string
         default: ansible_cache_keys
         env:
           - name: ANSIBLE_CACHE_REDIS_KEYSET_NAME
@@ -46,6 +49,7 @@ DOCUMENTATION = '''
         version_added: 1.3.0
       _sentinel_service_name:
         description: The redis sentinel service name (or referenced as cluster name).
+        type: string
         env:
           - name: ANSIBLE_CACHE_REDIS_SENTINEL
         ini:
@@ -54,13 +58,14 @@ DOCUMENTATION = '''
         version_added: 1.3.0
       _timeout:
         default: 86400
+        type: integer
+        # TODO: determine whether it is OK to change to: type: float
         description: Expiration timeout in seconds for the cache plugin data. Set to 0 to never expire
         env:
           - name: ANSIBLE_CACHE_PLUGIN_TIMEOUT
         ini:
           - key: fact_caching_timeout
             section: defaults
-        type: integer
 '''
 
 import re