Wrong param order when using errors.QueueNotMapped

Now all of the calling for errors.QueueNotMapped are using
the wrong parapemters order, this patch will fix it and
improve the unit test to cover that.

Closes-Bug: 1336141

Change-Id: Id6cc52862465535ef5c1c06649a0ac8bf3485386
limit=0 in sqlalchemy means 0 instead of unlimited

We're using limit=0 to query unlimited records. Unfornuately,
it doesn't work when a sql based database is used as pool
management database. In sqlalchemy, it means 0. This patch
will check if the limit is 0 to decide if applying the
limit() query for sqlalchemy.

Closes-Bug: 1337191

Change-Id: Iefc07ac41b17f52f7aa6607b0eb83dbc4cdef088
Use the class queue_name and project for tests

Marker's test used a local queue_name instead of the one defined in the
base class. This caused some tests to fail because the ran on a no clean
database.

The patch makes the test use the queue_name and the project defined in
the class.

Change-Id: I5a1682e835a07a452eb1114da8c87369fe2f48b4
Clean up queues created for certain tests

Some tests weren't cleaning the queues they created. This caused other
tests to fail because of they ran on a no clean database. The patch adds
cleanup calls that will delete those queues once the test ends.

Change-Id: Iac354c34e14783a4b9773c60efbf719c21a9f9d2
Fix typos

Change-Id: Ifd975f2cb5729b03470a4061dc8de8cf226508db
Merge "limit=0 in sqlalchemy means 0 instead of unlimited"
Merge "Wrong param order when using errors.QueueNotMapped"
Switch over oslo.i18n

oslo.i18n has recently been released. This patch switches marconi over
oslo.i18n. As per oslo.i18n's instructions, a new i18n module has been
added under marconi. This module defines the translation globals and
imports the necessary functions from oslo.i18n.

The patch doesn't change the way Marconi does translation, this means
that a `_` function is still being injected to the builtins.

Note that the gettextutils module is still a required module from
oslo-inc because there are oslo-inc modules that depend on the old
gettextutils module.

Closes-bug: #1314300

Change-Id: Ifb8f3296d1a0e2483ebd1c8d868b7359ecc99fb5
Merge "Switch over oslo.i18n"