Split only once to allow for colons in partition name

[sschmittgwdg]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.96%. Comparing base (c6a4b9b) to head (238be36).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3678   +/-   ##
========================================
  Coverage    91.96%   91.96%           
========================================
  Files           62       62           
  Lines        13769    13769           
========================================
  Hits         12662    12662           
  Misses        1107     1107           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[vkarak]

I am bit reluctant accepting this PR: : is the separator of a system and partition throughout the framework. I would instead suggest that the framework should deny partitions with : and avoid crashes. In your case, why is : important in the name of the partition?

[sschmittgwdg]

It's not important. I started having ReFrame's partitions named as our slurm partitions and the latter had a :. Denying : in ReFrame's partitions is fine for me.