Fix: Enable powertools repo for CentOS 8.* vers
The CR I43b943ddfc38faca does not work as expected since
ansible_facts does not match/return the minor versions of
the Repoid correctly.
For CentOS 8.2.2004 and earlier versions uses repoid as
'PowerTools' while CentOS 8.3.2011 and later versions uses repoid as
'powertools'. To handle this, check the repo file name under
/etc/yum.repos.d/ and enable the correct repository.
Ref: https://wiki.centos.org/Manuals/ReleaseNotes/CentOS8.2011\
Issue: RELENG-3710
Change-Id: Ib6a8d78664bbb5f20d2889fae3ae3b4238007141
Signed-off-by: Anil Belur <abelur@linuxfoundation.org>