fixes #23
kick started integration tests for required and greater than validators
integration test for only_if validator
fixed incorrect test description
added integration test for lessThanOrEqualToFieldValue validator
integer validator integration tests
integration tests for invalid chars validator
integration tests for max length validator
integration tests for range validator
integration tests for regex validator
added integration for greater than or equal to field value
added integration for custom validator
Merge pull request #24 from racker/integration_specs

Integration specs