Clarify that mco is not a hard requirement

[binford2k]

No description provided.

[coveralls]

Coverage remained the same at 50.746% when pulling 06049e6 on binford2k-patch-2 into 78bd9a8 on master.

[qralston]

I think this change helps clarify that mco is only a requirement if you specially want to use mco to update multiple masters, and that nothing stops you from using some other mechanism to update multiple servers.

[bastelfreak]

@binford2k @adrienthebo was that label intentional? Otherwise I'm fine with merging it.

[dhollinger]

Can we get the mcollective-client gem removed as runtime dependency added in this PR?

[qralston]

Can we get the mcollective-client gem removed as runtime dependency added in this PR?

+1 to this.

I don't want to install the mcollective-client gem if I don't need it, because it attempts to overwrite /opt/puppetlabs/puppet/bin/mco from the puppet-agent RPM package, which will then cause rpm --verify puppet-agent to throw checksum errors for /opt/puppetlabs/puppet/bin/mco.

[dhollinger]

@binford2k we'll have to add the mcollective-client gem as a development dependency as the tests utilize mcollective (sorry, didn't even think about that).