Added test for table.import() callback invocation
Added test for table.import() callback invocation

stephenplusplus/gcloud-node,stephenplusplus/gcloud-node,jcking/google-cloud-node,anandsuresh/gcloud-node,mziccard/gcloud-node,googleapis/google-cloud-node,ofrobots/google-cloud-node,nemo/gcloud-node,callmehiphop/gcloud-node,jmptrader/gcloud-node,phw/gcloud-node,VikramTiwari/gcloud-node,pcostell/gcloud-node,savethefails/gcloud-node,t9nf/gcloud-node,phw/gcloud-node,authbox-lib/gcloud-node,stephenplusplus/gcloud-node,SimpleEmotion/gcloud-node,callmehiphop/gcloud-node-ghpages,SimpleEmotion/gcloud-node,pcostell/gcloud-node,blowmage/gcloud-node,googleapis/google-cloud-node,savethefails/gcloud-node,jcking/google-cloud-node,savethefails/gcloud-node,SimpleEmotion/gcloud-node,GoogleCloudPlatform/gcloud-node,pcostell/gcloud-node,tcrognon/google-cloud-node,ofrobots/google-cloud-node,VikramTiwari/gcloud-node,blowmage/gcloud-node,authbox-lib/gcloud-node,t9nf/gcloud-node,GoogleCloudPlatform/gcloud-node,Muffasa/gcloud-node,googleapis/google-cloud-node,nemo/gcloud-node,anandsuresh/gcloud-node,jgeewax/gcloud-node,VikramTiwari/gcloud-node,stephenplusplus/gcloud-node-bigquery-debug,callmehiphop/gcloud-node,jcking/google-cloud-node,chrishiestand/gcloud-node,jmptrader/gcloud-node,mziccard/gcloud-node,chrishiestand/gcloud-node,stephenplusplus/gcloud-node-bigquery-debug,GoogleCloudPlatform/gcloud-node,t9nf/gcloud-node,googleapis/google-cloud-node,chrishiestand/gcloud-node,ofrobots/google-cloud-node,callmehiphop/gcloud-node-ghpages,authbox-lib/gcloud-node,tcrognon/google-cloud-node,nemo/gcloud-node,Muffasa/gcloud-node,Muffasa/gcloud-node,jgeewax/gcloud-node