Fixes --profile parameter

[danirod]

While attempting to debug some issue we found in our environment, I tried to make use of the --profile flag of shinken-broker. Unfortunately, this feature is broken because the context in which shinken runs doesn't have access to local or global variables, so this error is spit out:

Traceback (most recent call last):                                                  
  File "bin/shinken-poller", line 99, in <module>
    main()                                                                          
  File "bin/shinken-poller", line 95, in main
    cProfile.run('''daemon.main()''', opts.profile)                                                                                                                                              
  File "/usr/lib/python2.7/cProfile.py", line 29, in run                                                                                                                                         
    prof = prof.run(statement)                       
  File "/usr/lib/python2.7/cProfile.py", line 135, in run
    return self.runctx(cmd, dict, dict)
  File "/usr/lib/python2.7/cProfile.py", line 140, in runctx
    exec cmd in globals, locals
  File "<string>", line 1, in <module>
NameError: name 'daemon' is not defined

This PR uses cProfile.runctx instead of cProfile.run in order to provide cProfile our locals and our globals so that it finds the daemon and is able to spawn a profile environment. It fixes this error.

[coveralls]

Coverage decreased (-0.005%) to 27.725% when pulling 968c1ca on danirod:fixes-cprofile into a8c8ec9 on naparuba:master.

[naparuba]

Thanks for the fix and sorry about the (long) delay.