Supporting install of RTM on XCP-ng 8 series

[gnanet]

I managed to install rtm on a XCP-ng 8.2.0, but it required some hacking on the dependencies of the ovh-rtm-binaries package. I have removed two dependencies lsscsi, and redhat-lsb.

analysis:

After the successfull install, I was researching a bit on the dependency list, and found that

• lsscsi is available in the centos7 base-repo, and it's possible to use --enablerepo=base to satisfy the dependency
• the bigger issue was redhat-lsb package, which recursively depends on packages, that would install desktop stuff on the XCP-ng.
• Looked at the script rtmHardware.pl, i found that the required files in /etc were installed on the XCP-ng, so i was digging a bit, and found out, the required stuff comes from package redhat-lsb-core

conclusion:

It is easy to support the installation of RTM on XCP-ng 8 series:

1. in the package ovh-rtm-binaries change the dependency redhat-lsb => redhat-lsb-core

2. some minor change in the docs:

   1. the /etc/yum.repos.d/ovh-rtm.repo should not enable the repos per default

   [rtm]
   name=OVH RTM RHEL/ CentOS $releasever - $basearch
   baseurl=http://last.public.ovh.rtm.snap.mirrors.ovh.net/centos/$releasever/$basearch/Packages/
   enabled=0
   repo_gpgcheck=1
   gpgcheck=0
   gpgkey=http://last.public.ovh.rtm.snap.mirrors.ovh.net/ovh_rtm.pub
   
   [metrics]
   name=OVH METRICS RHEL/ CentOS $releasever - $basearch
   baseurl=http://last.public.ovh.metrics.snap.mirrors.ovh.net/centos/$releasever/$basearch/Packages/
   enabled=0
   repo_gpgcheck=1
   gpgcheck=0
   gpgkey=http://last.public.ovh.metrics.snap.mirrors.ovh.net/pub.key
   

   2. the command to install the RTM packages should be

   yum --enablerepo=base,metrics,rtm install ovh-rtm-metrics-toolkit