Add Pylint to VSPERF commit gate

Add Pylint to VSPERF commit gate

Initial pylint config file has been created to follow current
code structure and design. A few issues have been fixed, so currently
56 of 67 files have rating 10/10. There are still issues to be fixed,
mainly TODOs/FIXMEs and missing impelentation of abstract class members.

Change-Id: Icf5b12c2150258f8ac657f8d50b47a697d1660a0
JIRA: VSPERF-91
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>
Reviewed-by: Gene Snider <eugene.snider@huawei.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Tv Rao <tv.rao@freescale.com>
Reviewed-by: Brian Castelli <brian.castelli@spirent.com>