Add itertools dependency to support python2.7

- needed until a full swap to python 3 is effective
- minor fix to improve pylint on CsarParser

Issue-ID: INT-1228

Signed-off-by: umry8364 <morgan.richomme@orange.com>
Change-Id: I954794197233d17113bbdea5719d85980579d299
3 files changed