added missing glog includes in unit tests
added missing glog includes in unit tests

DLR-SC/tigl,codingpoets/tigl,DLR-SC/tigl,DLR-SC/tigl,codingpoets/tigl,codingpoets/tigl,DLR-SC/tigl,DLR-SC/tigl,codingpoets/tigl,DLR-SC/tigl,codingpoets/tigl,codingpoets/tigl