Allow plugin to be included in BOM

[basil]

When attempting to add this plugin to jenkinsci/bom, I received the following error when testing locally against the megawar:

[ERROR]   ConfigurationAsCodeITest.shouldCreateFreestyleJobUsingJobDsl:108->configureJenkins:134 » NoClassDefFound org/jenkinsci/plugins/configfiles/GlobalConfigFiles
[ERROR]   ConfigurationAsCodeITest.shouldFreestyleJobWithSpotBugsUsingJobDsl:69->configureJenkins:134 » NoClassDefFound org/jenkinsci/plugins/configfiles/GlobalConfigFiles
[ERROR]   ConfigurationAsCodeITest.shouldFreestyleJobWithTaskScannerUsingJobDsl:86->configureJenkins:134 » NoClassDefFound org/jenkinsci/plugins/configfiles/GlobalConfigFiles
[ERROR]   JobDslITest.shouldCreateFreestyleJobUsingJobDslAndVerifyIssueRecorderWithDefaultConfiguration:36->configureJenkins:126 » NoClassDefFound org/jenkinsci/plugins/configfiles/GlobalConfigFiles
[ERROR]   JobDslITest.shouldCreateFreestyleJobUsingJobDslAndVerifyIssueRecorderWithValuesSet:78->configureJenkins:126 » NoClassDefFound org/jenkinsci/plugins/configfiles/GlobalConfigFiles

This is a known issue that we have seen when adding other plugins to the BOM, and we have applied the same workaround in each case. Applying the usual workaround to this plugin chased away the issue as expected in my local testing, enabling this plugin to be added to jenkinsci/bom.

[codecov]

Codecov Report

Merging #1462 (4ca600a) into master (83c68a0) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1462   +/-   ##
=========================================
  Coverage     80.53%   80.53%           
  Complexity     1475     1475           
=========================================
  Files           254      254           
  Lines          5647     5647           
  Branches        426      426           
=========================================
  Hits           4548     4548           
  Misses          947      947           
  Partials        152      152           

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