Configuration format changes for collector and query-engine

They now take configuration in the standard ini format.
Default configuration file is read off /etc/contrail/collector.conf and
/etc/contrail/query-engine.conf

One can override the values from the config file through command line option
as well. e.g. --DEFAULT.log_level=DEBUG

Use --help to see various options available. Package build also places the
default config files under /etc/contrail/.

When changes are made to the configuration file, the process must be _restarted_
to take effect. (e.g. service supervisord-analytics restart).
Do not process collectors list of if it matches the default value
use 0.0.0.0 as listen address by default
Configuration format changes for collector and query-engine

They now take configuration in the standard ini format.
Default configuration file is read off /etc/contrail/collector.conf and
/etc/contrail/query-engine.conf

One can override the values from the config file through command line option
as well. e.g. --DEFAULT.log_level=DEBUG

Use --help to see various options available. Package build also places the
default config files under /etc/contrail/.

When changes are made to the configuration file, the process must be _restarted_
to take effect. (e.g. service supervisord-analytics restart).
Do not process collectors list of if it matches the default value
use 0.0.0.0 as listen address by default
Merge remote branch 'github/configuration_ini_format' into configuration_ini_format
Merge remote branch 'github/master' into configuration_ini_format
Fixing db_handler_test to accomodate bugfix b1742eaf53901ed1d172ebdfa084dcf3a31be863
Merge remote branch 'github/master' into configuration_ini_format
Merge remote branch 'github/master' into configuration_ini_format
When running code coverage for analytics systest, we should also run it across analytics unit test , gendb unit test and query_engine unit test.
under loaded scenario once the queue threshold is exceeded, trace for
queue exceed will be logged every pkt enqueue.

Removing the trace and adding stats for queue exceed for debugging.
Merge pull request #463 from Juniper/ashoksr_ut

Fix build-break and UT failures
Merge pull request #462 from Juniper/psethi_controller

Changing trace to stats for queue threshold exceeded
Merge remote branch 'github/master' into configuration_ini_format
Merge pull request #437 from Juniper/configuration_ini_format

Configuration ini format
Pass secondary collector as --DEFAULT.collectors in qed command line args
Merge pull request #464 from Juniper/ananth_bugfix

Pass secondary collector as --DEFAULT.collectors in qed command line arg...
Merge pull request #460 from Juniper/anishm_allcov

Anishm allcov