Description of problem:
Pod creation should fail when pod's node selector conflicts with project node selector.  It does, however, the error message used to be something like.

pods "east" is forbidden: pod node label selector conflicts with its project node label selector.  Where as currently pods just print '"east" already exists'  It looks like the older message is more appropriate for the situation.

Version-Release number of selected component (if applicable):
oc v1.1-734-gd198868
kubernetes v1.1.0-origin-1107-g4c8e6f4

How reproducible:
always.

Steps to Reproduce:
1. Create a project with node selector region=west
 oc create -f https://raw.githubusercontent.com/openshift-qe/v3-testfiles/master/projects/node-selector.json
2. Create a pod with node selector region=east under project in step 1

oc create -f https://raw.githubusercontent.com/openshift-qe/v3-testfiles/master/pods/selector-east.json -n jhou

Actual results:

"east" already exists
Expected results:
pods "east" is forbidden: pod node label selector conflicts with its project node label selector

Additional info: