Revert "Fix non-matching defaults in docs (#5446)"

This reverts commit a978bff2c7.

plugins/modules/net_tools/dnsmadeeasy.py

@@ -127,6 +127,7 @@ options:
     description:
       - Name or id of the contact list that the monitor will notify.
       - The default C('') means the Account Owner.
+    default: ''
     type: str
 
   httpFqdn:

plugins/modules/net_tools/infinity/infinity.py

@@ -42,22 +42,27 @@ options:
     description:
       - Network ID.
     type: str
+    default: ''
   ip_address:
     description:
       - IP Address for a reservation or a release.
     type: str
+    default: ''
   network_address:
     description:
       - Network address with CIDR format (e.g., 192.168.310.0).
     type: str
+    default: ''
   network_size:
     description:
       - Network bitmask (e.g. 255.255.255.220) or CIDR format (e.g., /26).
     type: str
+    default: ''
   network_name:
     description:
       - The name of a network.
     type: str
+    default: ''
   network_location:
     description:
       - The parent network id for a given network.

plugins/modules/net_tools/ldap/ldap_entry.py

@@ -37,7 +37,6 @@ options:
         entries are never modified. To assert specific attribute values on an
         existing entry, use M(community.general.ldap_attrs) module instead.
     type: dict
-    default: {}
   objectClass:
     description:
       - If I(state=present), value or list of values to use when creating