Implement post-flight check requirements into the codenvy/che-test image

[dmytro-ndp]

For the Codevny on-prem propose, the che-test should:

• Perform check in the next separate steps:

1. Authenticating as admin.
2. Generating 'your-first-workspace'.
3. Starting workspace runtime. (downloads 500MB image)

• Add create project step

4/. Creating Spring project in your-first-workspace.

• Stop and remove created workspace after the check.
• Support quiet mode with flag --quiet to avoid to display logs of starting workspace
• Support log without prefix mode with flag --logger-prefix-off to display results in the next format:

-> stdout
Authenticating as admin.
Generating 'your-first-workspace'.
Starting workspace runtime. (downloads 500MB image)
Creating Spring project in your-first-workspace.
(exit 0)

or, in case of error:

-> stdout
Authenticating as admin.
Generating 'your-first-workspace'.
-> stderr
error message
(exit 1)

• Input arguments: admin name and password. IP of Codenvy on-prem instance could be obtained by ifconfig command.
  login/password is given with --user= --password=

Here is a pull request.