Description of problem:
No files will be created when using 'oadm ca create-server-cert' 

Version-Release number of selected component (if applicable):
# oc version
oc v3.1.1.0
kubernetes v1.1.0-origin-1107-g4c8e6f4

How reproducible:
always

Steps to Reproduce:
1. set up ose env 
2. Create server cert file
  
   $ CA=/etc/openshift/master
   $ oadm ca create-server-cert --signer-cert=$CA/ca.crt       --signer-key=$CA/ca.key --signer-serial=$CA/ca.serial.txt       --hostnames='*.cloudapps.example.com'       --cert=cloudapps.crt --key=cloudapps.key
3. ls -lrt

Actual results:
cloudapps.crt and cloudapps.key did not be created.

Expected results:
cloudapps.crt and cloudapps.key should be created.

Additional info:
the env is using container install mode