added create index case to coordinator and generated getters for some fields in CreateIndexStatement
added tests to coordinator
merge - added coordinator tests
fixed merge issues
added create index test to coordinator
encapsulated datastore, cluster, catalog and table into methods to avoid code repetition
added storage cases to coordinator
Merge branch 'future/0.1.0' of https://github.com/Stratio/stratio-meta into future/0.1.0