Test only the pg backend in CI (temporary for pull request)

.travis.yml

@@ -37,10 +37,12 @@ before_script:
 - psql --command 'create database terraform_backend_pg_test;' --host localhost --username postgres
 
 script:
-- make test
-- go mod verify
-- make e2etest
-- GOOS=windows go build -mod=vendor
+- TF_ACC=1 make test TEST=./backend/remote-state/pg TESTARGS='-v'
+# main tests temporarily disabled while getting postgres-backend in shape
+# - make test
+# - go mod verify
+# - make e2etest
+# - GOOS=windows go build -mod=vendor
 # website-test is temporarily disabled while we get the website build back in shape after the v0.12 reorganization
 #- make website-test