RFE: adjustments for mock 2

[pcfe]

While mock-1.4.21-1.el7.noarch.rpm works a treat as documented in this repo, for mock-2… I will need to do some cleanups.
Assigning to myself, I want and need this to work with the latest mock and it's hopefully nothing major.

[pcfe]

note to self:
works mock-1.4.21-1.el7
does not work mock-2.2-1.el7.noarch or later

new template with mock 2, see https://github.com/rpm-software-management/mock/wiki/Feature-rhelchroots for a template that needs editing to point at Sat6

the config I used with 1.4.21 does not work with 2, I definitely want to switch over to an adjusted version of the config shipped with mock 2

[pcfe]

last successful build with a forced mock run (clean workspace) was 17-May-2020 17:25

checking build host update logs;

[root@jenkins ~]# grep mock /var/log/yum.log /var/log/yum.log-202*
/var/log/yum.log:May 18 00:35:15 Updated: mock-core-configs-32.6-1.el7.noarch
/var/log/yum.log:May 18 00:35:15 Updated: mock-2.2-1.el7.noarch
/var/log/yum.log:Jun 10 10:02:28 Installed: mock-2.2-1.el7.noarch
/var/log/yum.log:Jun 10 10:07:42 Installed: mock-2.3-1.el7.noarch
/var/log/yum.log:Jun 10 10:07:42 Installed: mock-core-configs-32.6-1.el7.noarch
/var/log/yum.log-20200101:Sep 25 14:25:54 Updated: mock-core-configs-31.2-1.el7.noarch
/var/log/yum.log-20200101:Sep 30 19:01:04 Updated: mock-1.4.19-1.el7.noarch
/var/log/yum.log-20200101:Nov 16 17:03:09 Updated: mock-core-configs-31.6-1.el7.noarch
/var/log/yum.log-20200101:Nov 16 17:03:16 Updated: mock-1.4.20-1.el7.noarch
/var/log/yum.log-20200101:Nov 18 22:53:22 Updated: mock-core-configs-31.7-1.el7.noarch
/var/log/yum.log-20200101:Nov 18 22:53:22 Updated: mock-1.4.21-1.el7.noarch