Stupid vim tried to be helpful.

Removed octothorpes from scm-config.ini.erb.
Manage Package['cloudera-manager-daemons'].
Lots of fixes.

Fix typos with $ci_yumpath and cm_yumpath.
Anchor all classes together do that the yumrepos will be installed
before the packages.
Add define of $service_enable to params.pp.
Add Class['cloudera::cdh::impala'] to Class[''cloudera::cdh'].