Description of problem:
It will prompt the error message: "Invalid descriptor YAML: Requires:" after executing 'rhc-admin-add-template' command to create a template

Version-Release number of selected component (if applicable):
rhc-0.88.1-1.git.1.8333764.el6.noarch

How reproducible:
Always



Steps to Reproduce:
precondition
Create a quickstart template  - /tmp/foo.yaml with wrong packages

---
Vendor: unknown
Requires:
- php-xx
Architecture: noarch
Description:
License: unknown
Subscribes:
  doc-root:
    Required: false
    Type: FILESYSTEM:doc-root
Version: 0.0

1.Add a template
# rhc-admin-add-template -n wordpress -d /tmp/foo.yaml -g git://github.com/openshift/wordpress-example.git -t wordpress  -c 1  -m '{"a":"b"}'

  
Actual results:
It will prompt the error message: "Invalid descriptor YAML: Requires

Expected results:
Template could be created successfully without any error

Additional info:
workaround: add code " require 'yaml' " into /usr/bin/rhc-admin-add-template