BZ 1073096

`rhqctl --help install` tries to install the components instead of showing a help - Finding out whether user wants to just print a help. If it is the case, no warning ('An agent RPM installation was found...') with consequent 30s waiting is displayed.

`NOTE:` I am doing this as a pull request instead of a direct push just for sure, because I don't know the installer code well. See the BZ comments for more details about the issue.