[PBR] update python-utils version for pbr

[PBR] update python-utils version for pbr

since last version of pbr a check is done to verify that the python
module version is not outdated regarding the last tag
as a 7.0.1 tag has been created (for guilin minatenance release)
there is an issue as the default version was 0.6.0 < 7.0.1
thakns Michal for the troubleshooting

Issue-ID: INT-1915

Signed-off-by: morganrol <morgan.richomme@orange.com>
Change-Id: I513c719fcc58390395199dcf982029d15725eff5
(cherry picked from commit 8b7f01b1233799ae6ac55c3a362915e19efe136e)