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.
Merge pull request #1954 from mccun934/adjust-wget-timing

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