Looks like EnvInject and/or JobDSL have a bug.

Steps to reproduce:

1. Set up a job that runs this JobDSL:

`job('run_deploy_mock') {
steps {
environmentVariables

}
}`

2. Run it and it will create a job called 'deploy_mock'
3. Run the 'deploy_mock' job. After build #1 is done, go to build details and check 'Environmental Variables' section for an entry called 'component1'
4. Run the JobDSL job again
5. Check 'Environmental Variables' section for 'deploy_mock' build #1. The 'component1' variable is now missing.

If I substitute the '=' for something else, it works as expected.