Using common variables in script

tests/base.bats

@@ -1,7 +1,9 @@
 #!/usr/bin/env bats
 
+load ../common
+
 @test "curl should connect to InCommon cert chain site successfully" {
-  run docker run -i tier/centos7base curl -o /dev/null --silent --head --write-out '%{http_code}\n' https://github.internet2.edu/
+  run docker run -i $maintainer/$imagename curl -o /dev/null --silent --head --write-out '%{http_code}\n' https://github.internet2.edu/
   echo ${output}
   [ "$status" -eq 0 ]
   [[ ${output} == *"302"* || ${output} == *"200"* ]]