Allow symlinks to phoebus.sh

[krisztianloki]

Starting Phoebus using a symlink to phoebus.sh is not possible because the detection where Phoebus was installed fails which means the .jar cannot be found.

This PR uses realpath instead of the cd and pwd -P pair to resolve symlinks and convert the path to absolute.

There is another problem if the installation path contains spaces; we need to put ${TOP} inside quotes.

Checklist

• Testing:
  • The feature has automated tests
  • Tests were run
  • Used phoebus.sh to check if it works for symlinks and paths containing spaces
• Documentation:
  • The feature is documented
  • The documentation is up to date
  • Release notes:
    • Added an entry if the change is breaking or significant
    • Added an entry when adding a new feature

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud