Add a CodeClimate coverage badge
Add a CodeClimate coverage badge

The Weblogic buildpack is meant to have a Code Climate coverage badge. This
commit adds one.

[#73613356]

Informatthic/weblogic-buildpack,tkarlsson-pivotal/weblogic-buildpack,pivotal-cf/weblogic-buildpack,pivotal-cf/weblogic-buildpack,tkarlsson-pivotal/weblogic-buildpack,tkarlsson-pivotal/weblogic-buildpack,Informatthic/weblogic-buildpack,Informatthic/weblogic-buildpack,pivotal-cf/weblogic-buildpack,tkarlsson-pivotal/weblogic-buildpack,pivotal-cf/weblogic-buildpack,Informatthic/weblogic-buildpack