(maint) Remove etc/mcollective/ssl from debian install file

There is nothing to install from /etc/mcollective/ssl anymore now that the
PLACEHOLDER isn't installed. But that's okay, because
/etc/mcollective/ssl/clients is created by the mcollective.dirs file, so the
etc/mcollective/ssl line can be safely removed from the mcollective.install
file.
(maint) Remove build dependencies on rubygems, stomp library

There is no need to have rubygems or the stomp library at build time, but
install.rb was checking that they were there and could be loaded. This commit
removes the check for stomp and rubygems from install.rb and also removes the
corresponding build dependencies from the redhat and debian packages.
Merge pull request #129 from haus/maint/master/packaging_fixups

Maint/master/packaging fixups
23107 - Release 2.3.3

Update release notes and changelog