Check entity types when adding a view. All variables must have the same entity type as the view's entity type.
Merge pull request #27 from emorency/feature/test-create-view-entity

Check entity types when adding a view. All variables must have the same ...
opal-ws depends on opal-search
Delete TestUtils
Initialise view before getting variables
Fixed test for view creation with different entity types
Merge pull request #28 from emorency/feature/test-create-view-entity

OPAL-1724: Fixed error and test