One more test

Author: michaelklishin

test/config_schema_SUITE_data/snippets.config

@@ -788,14 +788,24 @@ background_gc_target_interval = 30000",
     {background_gc_target_interval, 30000}
 ]}],[]},
 
-{78,
+{78.1,
 "credential_validator.validation_backend = rabbit_credential_validator_min_password_length
 credential_validator.min_length = 10",
 [{rabbit, [
     {credential_validator, [
       {validation_backend, rabbit_credential_validator_min_password_length},
       {min_length,         10}
     ]}
+]}],[]},
+
+{78.2,
+"credential_validator.validation_backend = rabbit_credential_validator_password_regexp
+credential_validator.regexp = ^abc\\d+",
+[{rabbit, [
+    {credential_validator, [
+      {validation_backend, rabbit_credential_validator_password_regexp},
+      {regexp,             "^abc\\d+"}
+    ]}
 ]}],[]}
 
 ].