Improve generation of ini configuration files.

This commit fixes issue when new options are placed at the
section beginning, but not after same commented option.
Iniparse RawConfigParser extented to override set option
behavior to the better one.

Change-Id: I12be39c0168f42db5f5c642f6f5b314b71314397
Ini parsing logic moved to separate module

* So ini and yaml parsing functionality is placed
in different modules now.
* Missing license headers added.

Change-Id: Ib214bdc1d56747ab5d88e7d577a136da2587fc42
Merge "Improve generation of ini configuration files."
Merge "Ini parsing logic moved to separate module"