Check for malformed JSON when creating a queue.

Meanwhile,
    1. Dumps UTF-8 JSON in response;
    2. Set Content-Location for GET.

Implements: blueprint transport-wsgi

Change-Id: I04c988168366f60cf88a0693bab50ded5b855117
Delete queue in WSGI.

Change-Id: I4029e6f01763cb4bfdba3a4e9c6eacf972173923
Implements: blueprint transport-wsgi
List queues in WSGI (w/o paging, but compatible).

Change-Id: I1e56317b762dc079dbb00751400817c049e927db
Implements: blueprint transport-wsgi