RAD-190 Refactor DicomViewer and its GP
* rename DicomViewer to DicomWebViewer
* add GP, config.xml entries for dicomWebViewer Address, Port, BaseUrl,
* remove GP for serverPort since it was only used for dicom web viewer
* RadiologyProperties.getServersAddress() returns GP without prefix 'http://'
* improve descriptions in config.xml for dicom web viewer configs
* adapt RadiologyProperties methods and tests
* move logic for oviyam serverName query param to DicomWebViewer
* update javadocs and rearrange tests of DicomWebViewer