Build autoreduction web app queue processor

[MarcusNoble]

Build a python app to be run as a daemon to listen for, process and respond to ActiveMQ messages.

Should be able to handle the following topics:

• Data.Ready
• Reduction.Ready
• Reduction.Started
• Reduction.Complete
• Reduction.Error

It should be able to reuse the models used by the web app to interact with the database.

For Tester:

1. Connect to datareducedev.isis.cclrc.ac.uk
2. sudo su
3. export PATH="/usr/local/bin:$PATH"
4. python /var/www/autoreduce_webapp/manage.py test (Note: One test will take longer than the others as it waits for a timeout)
5. When asked for ICAT credentials enter your federal ID credentials (This will happen twice)

Expected output:

[root@datareducedev autoreduce_webapp]# python /var/www/autoreduce_webapp/manage.py test
Creating test database for alias 'default'...

ICAT Username: 
ICAT Password:
..............................
ICAT Username: 
ICAT Password:
......................
----------------------------------------------------------------------
Ran 52 tests in 141.537s

OK
Destroying test database for alias 'default'...

[MarcusNoble]

Topics changed to:

/topic/DataReady
/topic/ReductionPending
/topic/ReductionStarted
/topic/ReductionComplete
/topic/ReductionError

to make sure they are recognised as topics by ActiveMQ.

For Tester:

See ticket #10267

[MarcusNoble]

Code checked in.

Still needs the following tests:

• check graphs are correctly handled
• check temporary reduce.py scripts are created

[Anders Markvardsen]

app build to listen for and respond to messages as described in ticked.

This is extensively tested in QueueProcessorTestCase and all tests are passing