(QENG-124) get rid of add_master_entry

- execution of add_master_entry has been off by default for a while, so
  we know that this code is no longer necessary, this is just clean up
Merge pull request #314 from anodelman/maint

(QENG-124) get rid of add_master_entry
(MAINT) Add PE 3.4 installer answers module.

Also adds spec tests.

Signed-off-by: Wayne <wayne@puppetlabs.com>