Support RHEL7 in RPM package
Support RHEL7 in RPM package

- install python code to the lib path for python2.7
- remove capability python2.6-midonetclient, which is
  not used
- Add proper dependency to python 2.6 and 2.7

Implements: MN-2968

Change-Id: I4ea071794f769572b813d406623046e6bf2246f8

midokura/python-midonetclient,midonet/python-midonetclient,midokura/python-midonetclient,midonet/python-midonetclient