change travis to test postgres9.4
change travis to test postgres9.4

philiptzou/clincoded,philiptzou/clincoded,philiptzou/clincoded,ClinGen/clincoded,philiptzou/clincoded,ClinGen/clincoded,ClinGen/clincoded,philiptzou/clincoded,ClinGen/clincoded,ClinGen/clincoded