1861 - don't use waitretry as it backs off and causes multi-minute waits

By switching to --wait=2 and --tries=30 we get a ~60 second wait time
to see if mongo starts up.  Before with --waitretry=30 you get a back
off algorithm which can cause katello-configure to take an extra 3-5
minutes to complete.
(cherry picked from commit 352c159f639d1b51e50987093ca9b6be5b495189)
forgot to update the sed paths to clean the passwords
(cherry picked from commit 13ccfabfba57ec4ec7ff7743ddc3cd6d110e7105)
treat CentOS like RHEL, otherwise the install fails
(cherry picked from commit c611c4ec12f8b251ca1926bb6f8d49660f3b0cea)
update katello-debug to the pulp-v2 configuration file location
(cherry picked from commit 03a0f222d97332a057f0973a35125453d4d56c6f)
Merge pull request #1988 from mccun934/KATELLO-1.3

mccun934's katello-1.3 cherry-picks from master