Role modules: Docs: Fix default value for string list parameters

Fix default values for string list parameters where default is missing
in the DOCUMENTATION section, but is defined in argument_specs.

roles/ipareplica/library/ipareplica_test.py

@@ -42,6 +42,7 @@ options:
     type: list
     elements: str
     required: no
+    default: []
   domain:
     description: Primary DNS domain of the IPA deployment
     type: str
@@ -51,6 +52,7 @@ options:
     type: list
     elements: str
     required: no
+    default: []
   realm:
     description: Kerberos realm name of the IPA deployment
     type: str
@@ -66,6 +68,7 @@ options:
     type: list
     elements: str
     required: no
+    default: []
   hidden_replica:
     description: Install a hidden replica
     type: bool
@@ -112,18 +115,21 @@ options:
     type: list
     elements: str
     required: no
+    default: []
   http_cert_files:
     description:
       File containing the Apache Server SSL certificate and private key
     type: list
     elements: str
     required: no
+    default: []
   pkinit_cert_files:
     description:
       File containing the Kerberos KDC SSL certificate and private key
     type: list
     elements: str
     required: no
+    default: []
   no_ntp:
     description: Do not configure ntp
     type: bool
@@ -134,6 +140,7 @@ options:
     type: list
     elements: str
     required: no
+    default: []
   ntp_pool:
     description: ntp server pool to use
     type: str
@@ -153,6 +160,7 @@ options:
     type: list
     elements: str
     required: no
+    default: []
   no_forwarders:
     description: Do not add any DNS forwarders, use root servers instead
     type: bool