Fixing ambiguity in meta grammar
Fixing update assignation problem
Fixing assignation errors in grammar
Add validation requirements
Json issue while grammar refactor solved
Merge commit '4b4cb47c55a211c0569f60b6fd755ea53a947517' into future/0.1.0
Catalog validation
Fixing test problems
Modify Planner and PlannedQuery.
Merge branch 'future/0.1.0' into future/0.1.0-planner-refactor

Conflicts:
	meta-core/src/main/java/com/stratio/meta/core/statements/CreateIndexStatement.java
	meta-core/src/main/java/com/stratio/meta2/core/statements/CreateCatalogStatement.java
	meta-core/src/main/java/com/stratio/meta2/core/statements/MetaStatement.java