Switch distro-specific module streams

[mark-au]

Some dnf modules are named after a distribution('rhel' or 'rhel8'). Switch them to to the 'ol' or 'ol8' equivalents. Resolves #8

An example of CentOS8:

$ dnf module list | grep rhel
container-tools      rhel8 [d]   common [d]                               Common tools and dependencies for container runtimes                        
go-toolset           rhel8 [d]   common [d]                               Go                                                                          
jmc                  rhel8 [d]   common [d], core                         Java Mission Control is a profiling and diagnostics tool for the Hotspot JVM
llvm-toolset         rhel8 [d]   common [d]                               LLVM                                                                        
rust-toolset         rhel8 [d]   common [d]                               Rust                                                                        
virt                 rhel [d][e] common [d]                               Virtualization module

Signed-off-by: Mark Cram mark.cram@oracle.com

[mark-au]

In draft state while I do a final test