[LMS-594] check permissions when role assignments are created

...nbis/generic/client/web/client/IGenericClientService.java

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

...neric/client/web/client/application/ui/AddRoleDialog.java

...s/generic/client/web/client/application/ui/RolesView.java

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

...eneric/client/web/server/GenericClientServiceServlet.java

...h/systemsx/cisd/openbis/generic/server/GenericServer.java

...emsx/cisd/openbis/generic/server/GenericServerLogger.java

...openbis/generic/server/dataaccess/IRoleAssignmentDAO.java

...enbis/generic/server/dataaccess/db/RoleAssignmentDAO.java

.../systemsx/cisd/openbis/generic/shared/IGenericServer.java