only check external hrefs on master (#1652)
only check external hrefs on master (#1652)

Signed-off-by: Doug Davis <ff3bde741799c0eff815b83a54eda3fc494df54f@us.ibm.com>
kibbles-n-bytes/service-catalog,kubernetes-incubator/service-catalog,n3wscott/service-catalog,MHBauer/service-catalog,MHBauer/service-catalog,MHBauer/service-catalog,kibbles-n-bytes/service-catalog,n3wscott/service-catalog,kibbles-n-bytes/service-catalog,duglin/service-catalog,staebler/service-catalog,kubernetes-sigs/service-catalog,jboyd01/service-catalog,n3wscott/service-catalog,jboyd01/service-catalog,kubernetes-incubator/service-catalog,duglin/service-catalog,jboyd01/service-catalog,vaikas-google/service-catalog,kubernetes-incubator/service-catalog,kubernetes-incubator/service-catalog,n3wscott/service-catalog,staebler/service-catalog,kubernetes-sigs/service-catalog,MHBauer/service-catalog,n3wscott/service-catalog,duglin/service-catalog,MHBauer/service-catalog,martinmaly/service-catalog,kubernetes-sigs/service-catalog,staebler/service-catalog,kibbles-n-bytes/service-catalog,kubernetes-sigs/service-catalog,MHBauer/service-catalog,jboyd01/service-catalog,kubernetes-incubator/service-catalog,n3wscott/service-catalog,staebler/service-catalog,duglin/service-catalog,martinmaly/service-catalog,kubernetes-sigs/service-catalog,vaikas-google/service-catalog,jboyd01/service-catalog,duglin/service-catalog,duglin/service-catalog,kubernetes-incubator/service-catalog,staebler/service-catalog,martinmaly/service-catalog,kubernetes-sigs/service-catalog,jboyd01/service-catalog,kibbles-n-bytes/service-catalog,staebler/service-catalog,kibbles-n-bytes/service-catalog,vaikas-google/service-catalog