bump net-ssh-gateway to 1.2.0 since 1.1.2 was yanked

Signed-off-by: dmitriy kalinin <dmitriy@pivotallabs.com>
Merge final release for build 2597 to develop
fix broken bosh_cli_plugin_micro because of an earlier provider move

Signed-off-by: dmitriy kalinin <dmitriy@pivotallabs.com>
Adding final release for build 2603