feat(response): possibility of placeholder vars in standard responses to improve error details

cleanup cover_db and to .gitignore it further on in developer commits

Author: KaiSchwarz-cnic

.gitignore

@@ -9,4 +9,5 @@ pm_to_blib
 !WebService-Hexonet-Connector-latest.tar.gz
 node_modules
 package-lock.json
-Makefile
+Makefile
+cover_db

MYMETA.json

@@ -61,6 +61,6 @@
       }
    },
    "release_status" : "stable",
-   "version" : "v2.4.0",
+   "version" : "v2.5.0",
    "x_serialization_backend" : "JSON::PP version 2.27400_02"
 }

MYMETA.yml

@@ -39,5 +39,5 @@ requires:
   perl: '5.026000'
   utf8: '0'
   version: '0.9924'
-version: v2.4.0
+version: v2.5.0
 x_serialization_backend: 'CPAN::Meta::YAML version 0.018'