Rename IGroupBO to ISpaceBO.

...d/openbis/generic/server/CommonBusinessObjectFactory.java

...ch/systemsx/cisd/openbis/generic/server/CommonServer.java

...a/ch/systemsx/cisd/openbis/generic/server/ETLService.java

...eric/server/business/bo/ICommonBusinessObjectFactory.java

...msx/cisd/openbis/generic/server/business/bo/ISpaceBO.java

...emsx/cisd/openbis/generic/server/business/bo/SpaceBO.java

...ystemsx/cisd/openbis/generic/server/CommonServerTest.java

.../cisd/openbis/generic/server/business/bo/SpaceBOTest.java

...x/cisd/openbis/generic/shared/AbstractServerTestCase.java