[LMS-635] Split IGenericClientService

...enbis/generic/client/web/client/ICommonClientService.java

.../generic/client/web/client/ICommonClientServiceAsync.java

...openbis/generic/client/web/client/application/Client.java

.../generic/client/web/client/application/EntityChooser.java

...neric/client/web/client/application/GenericConstants.java

...penbis/generic/client/web/server/CommonClientService.java

...ugin/generic/client/web/client/IGenericClientService.java

...generic/client/web/client/IGenericClientServiceAsync.java

...nt/web/client/application/sample/GenericSampleViewer.java

...lugin/generic/client/web/server/GenericClientService.java

...is/generic/client/web/server/CommonClientServiceTest.java

...n/generic/client/web/server/GenericClientServiceTest.java