fixes issues #2955 and #2959

[hangyakuzero]

Description

Recently @robkooper changed the way the docker install works so that pecan is reached from http://pecan.localhost/ instead of http://localhost:8000/. I've made the changes in the documentation in #2935, but there are still instances of "localhost:8000" in tests, shell scripts,etc. I have made the changes accordingly.
Also I have changed the regex pattern as required.

this fixes issue #2955 and #2959

Review Time Estimate

• Immediately
• Within one week
• When possible

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My change requires a change to the documentation.
• My name is in the list of CITATION.cff
• I have updated the CHANGELOG.md.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[infotroph]

This still won't catch jobids without a literal space before them (e.g. my old frenemy "ondemand52.aci.ics.psu.edu.568420642 submitted"), but my sense is that in practice every default involving qsub should be thought of less as a value that will work for most people and more as an example of how to specify your own value when the default inevitably fails on your system. Therefore I support merging this as it is.