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
Merge remote branch 'github/master' into configuration_ini_format
Merge remote branch 'github/master' into configuration_ini_format
Merge remote branch 'github/master' into configuration_ini_format
Merge pull request #437 from Juniper/configuration_ini_format

Configuration ini format