Can not use symbol '_' in 'Docker Container (package)' field 'Application Name'.

Can not use symbol '_' in 'Docker Container (package)' field 'Application Name'.

Configuration:
MOS 9.1 snapshot #213

Actions:
1) OK - Download 'Docker Container (package)' to murano.
    http://apps.openstack.org/#tab=murano-apps&asset=Docker%20Container

2) OK - Add package to murano-env.

3) OK - In configuration in field 'Application Name' set 'Docker_ImageFromLocalRepo'.
    According description underline symbol is allowed.
    ...
    Application Name:
    Enter a desired name for the application. Just A-Z, a-z, 0-9, dash and underline are allowed
    ...

4) Not OK - Deploy Murano env.
    Deploy has failed.

    Extraction from logs:

    2016-09-13 08:08:47 - Creating services for Pod testpod
    2016-09-13 08:09:19 - Deploying Replication Controller for Pod testpod
    2016-09-13 08:09:33 - Error:
        {'errorCode': 100, 'message': u'Script updateReplicationController returned error code',
        'extra': None,
        'details': {u'stdout': None, u'stderr': u'W0913 08:09:32.556772 2647 cmd.go:258]
        update is DEPRECATED and will be removed in a future version.
        Use replace instead.\n
        The ReplicationController "testpod" is invalid.\n\n
        * spec.template.spec.containers[1].name:
        Invalid value: "docker_imagefromlocalrepo": must match the
        regex [a-z0-9]([-a-z0-9]*[a-z0-9])?
        (e.g. \'my-name\' or \'123-abc\')\n
        * spec.template.spec.containers[1].name:
        Invalid value: "docker_imagefromlocalrepo": must match the
        regex [a-z0-9]([-a-z0-9]*[a-z0-9])?
        (e.g. \'my-name\' or \'123-abc\')',
        u'exitCode': 1}, 'time': u'2016-09-13 08:09:32.739319'}

    As we can see from logs symbol '_' is allowed according to the description, but actually
    is not allowed.