Add support of XML request with rest protocol

bc-generators/artifact-generators/pom.xml

gm-api/pom.xml

...s/src/main/java/eu/chorevolution/vsb/gmdl/utils/Data.java

...c/main/java/eu/chorevolution/vsb/gmdl/utils/VsbError.java

...orevolution/vsb/gm/protocols/coap/BcCoapSubcomponent.java

.../eu/chorevolution/vsb/gm/protocols/coap/CoapObserver.java

.../eu/chorevolution/vsb/gm/protocols/dpws/DpwsObserver.java

...orevolution/vsb/gm/protocols/mqtt/BcMQTTSubcomponent.java

...n/vsb/gm/protocols/mqtt/BcSoapGeneratorDTSGoogleTest.java

...revolution/vsb/gm/protocols/mqtt/BcSoapGeneratorTest.java

...ion/vsb/gm/protocols/mqtt/BcSoapGeneratorWeatherTest.java

protocol-pool/gm-rest/pom.xml

...orevolution/vsb/gm/protocols/rest/BcRestSubcomponent.java

...orevolution/vsb/gm/protocols/rest/RestErrorException.java

...orevolution/vsb/gm/protocols/rest/RestRequestBuilder.java

...revolution/vsb/gm/protocols/rest/RestResponseBuilder.java

.../main/java/eu/chorevolution/vsb/gidl2wsdl/GidlToWSDL.java

.../chorevolution/vsb/gm/protocols/soap/BcSoapGenerator.java

...n/vsb/gm/protocols/soap/BcSoapGeneratorDTSGoogleTest.java

...revolution/vsb/gm/protocols/soap/BcSoapGeneratorTest.java