Code review updates for metbk_a parser.
Fixed dcl timestamp issue in dosta_abcdjm_dcl, flort_dj_dcl, and spkir_abj_dcl. 
Note: only setting the internal timestamp in the __init__ method of the 
xxxParticle class has been changed.

The bug was that the fractional seconds precision was being ignored.

There is a new utilities.py file that can contain methods that can be used 
by more than one parser. Methods can be added to this.
Merge "Fixed dcl timestamp issue in dosta_abcdjm_dcl, flort_dj_dcl, and spkir_abj_dcl.  Note: only setting the internal timestamp in the __init__ method of the  xxxParticle class has been changed."
Code review updates for pco2a_a parser.

Change-Id: I5e56ac63b9bcc565169a113ae715198b235bb45c