Removal the use of OrderecDict().
OrderedDict is first available in python 2.7, and is not essential functionality.
The functionality is replaced with looping over a list of dictionary keys instead, which is picked up under analysis.
Bug #22798 (https://gna.org/bugs/?22798): Failure of relax to start due to an OrderedDict ImportError on Python 2.6 and earlier.
Authored by: tlinnet 2014-10-13
Parent: [r26258]
Child: [r26260]
