Description of problem:
Presently, with over 41,000 consumers
  """SELECT COUNT(1) FROM `cp_consumer`;"""
the '/consumers' call never returns. 
(It will keep the HTTP session alive though :-)

Version-Release number of selected component (if applicable):
0.5.x and 0.7.3

How reproducible:
consistent

Steps to Reproduce:
1. Have a ton of consumers ( > 41000 )
2. call /consumers
3.
  
Actual results:
never returns

Expected results:
A list of consumers. Potentially segmenting the expected results with pagination parameters.

Additional info: