Add unit test for CORS functionality.
Add unit test for CORS functionality.

diekhans/ga4gh-server,pcingola/server,ga4gh/server,macieksmuga/server,srblum/server,pansapiens/server,pcingola/server,dcolligan/server,srblum/hackathon-server,pansapiens/server,dcolligan/server,saupchurch/server,dcolligan/server,shajoezhu/server,srblum/hackathon-server,saupchurch/server,ohsu-computational-biology/server,srblum/server,jeromekelleher/server,david4096/ga4gh-server,macieksmuga/server,srblum/server,pcingola/server,ohsu-computational-biology/server,pansapiens/server,ekalosak/server,ga4gh/server,shajoezhu/server,hjellinek/server,adamnovak/server,ga4gh/server,ekalosak/server,hjellinek/server,david4096/ga4gh-server,UMMS-Biocore/ga4gh-server,diekhans/ga4gh-server,jeromekelleher/server,hjellinek/server,adamnovak/server,david4096/ga4gh-server,saupchurch/server,UMMS-Biocore/ga4gh-server,macieksmuga/server,adamnovak/server,UMMS-Biocore/ga4gh-server,ekalosak/server,diekhans/ga4gh-server,srblum/hackathon-server,ohsu-computational-biology/server