Drain queues where appropriate to avoid race conditions

We have a theory that these two places require checks to ensure the queue is
drained/processed before continuing, to avoid a potential race.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #1104 from kbarber/maint/stable/drain-queues-to-avoid-races

Drain queues where appropriate to avoid race conditions
Revert "Try reverting to c1.medium"

This reverts commit 3aa02cfb5c132b968cc20610061bb65d53411d62.
Merge pull request #1107 from kbarber/maint/stable/c3-large-instances-again

Revert "Try reverting to c1.medium"
Fix for acceptance test issue related to fact path -> fact value
constraint violation
More clarification around using an IP address for ssl-host and host

Setting `ssl-host` and `host` to a hostname often causes problems due to
resolution failing, pointing at the wrong thing or sometimes even resolving
first to an IPv6 address instead of an IPv4.

This patch fixes some documentation and the comment in the configuration
file to forewarn users of this scenario, so they can avoid it.

Signed-off-by: Ken Barber <ken@bob.sh>
Fixed big when updating the values for an exsting certname's factset
Merge pull request #1109 from kbarber/maint/stable/avoid-hostnames-in-host-entries

More clarification around using an IP address for ssl-host and host
Merge pull request #1108 from senior/maint/stable/fact-path-constraint-violation-fix

Fix for acceptance test issue related to fact path -> fact value constraint violation
(PDB-13) Add wheezy to PDB acceptance tests

This PR adds a wheezy image to our acceptance tests.