Description of problem:
On create app from image page, when env or label name is empty, user still could perform create action, but fianlly it will fail. It's better to disable the creation when env or label name is empty

Version-Release number of selected component (if applicable):
openshift v1.3.0-alpha.3+7f59726
kubernetes v1.3.0+52492b4
etcd 2.3.0+git


How reproducible:
Always

Steps to Reproduce:
1.Login to openshift web console and create a new project
2.Add to project -> select one image
3.Fill Name and Git Repository URL
4.In Build Configuration part, only set env value to "bc-env-value-1"
In Deployment Configuration part, only set env value to "dc-env-value-1"
In Labels part, only set Labels value to "label-value-1"
5.Click "Create"

Actual results:
5. Could create but fianlly failed, errors indicating cannot create <resource> is shown on next step page
Cannot create route "php". Route  "php" is invalid: [metadata.labels: Invalid value: "": name part must  be non-empty, metadata.labels: Invalid value: "": name part must match  the regex ([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9] (e.g. 'MyName' or  'my.name' or '123-abc')].

Cannot create build config "php". BuildConfig  "php" is invalid: [metadata.labels: Invalid value: "": name part must  be non-empty, metadata.labels: Invalid value: "": name part must match  the regex ([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9] (e.g. 'MyName' or  'my.name' or '123-abc'), spec.strategy.sourceStrategy.env[0].name:  Required value].

Cannot create deployment config "php". DeploymentConfig  "php" is invalid: [metadata.labels: Invalid value: "": name part must  be non-empty, metadata.labels: Invalid value: "": name part must match  the regex ([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9] (e.g. 'MyName' or  'my.name' or '123-abc'), 
spec.template.labels: Invalid value: "": name  part must be non-empty, spec.template.labels: Invalid value: "": name  part must match the regex ([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9] (e.g.  'MyName' or 'my.name' or '123-abc'),  spec.template.spec.containers[0].env[0].name: Required value].

Cannot create image stream "php". ImageStream  "php" is invalid: [metadata.labels: Invalid value: "": name part must  be non-empty, metadata.labels: Invalid value: "": name part must match  the regex ([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9] (e.g. 'MyName' or  'my.name' or '123-abc')].

Cannot create service "php". Service  "php" is invalid: [metadata.labels: Invalid value: "": name part must  be non-empty, metadata.labels: Invalid value: "": name part must match  the regex ([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9] (e.g. 'MyName' or  'my.name' or '123-abc')].

Expected results:
5. When env or label name is empty, should prevent user from creating 

Additional info: