Implemented the logic in BrokerPolicyValidator handler to validate a BP
when it is PUT inside GReg at the specified path. Using a
PolicyCompletenessCompliance object to do that.
Added the BrokerAtCloud WSO2 Composite Application project which
registers the BrokerPolicyValidationHandler inside GReg.
BrokerPolicyValidationHandler project references
PolicyCompletenessCompliance project for compile time. However, for
runtime, its classes (along with the Jena classes) should be made
available explicitely. See Git Repository Readme.md instructions on how
to do this.