jenkins 4.16 still rhel8

[garethahealy]

jenkins 4.16 base is still RHEL8 and hasn't been built in a while. the latest oc wants:

RUN oc version --client &&     kubectl version --client
oc: /lib64/libc.so.6: version `GLIBC_2.33' not found (required by oc)
oc: /lib64/libc.so.6: version `GLIBC_2.34' not found (required by oc)
oc: /lib64/libc.so.6: version `GLIBC_2.32' not found (required by oc)

RHEL8 uses glibc-2.28

• https://github.com/redhat-cop/containers-quickstarts/pull/833
• https://github.com/redhat-cop/containers-quickstarts/pull/857