Add hook for sse-gateway and workflow-cps for node and node_modules issue

[kshultzCB]

Description

Some Jenkins plugins end up with node and node_modules directories in their local source directories after compilation. With standard builds this is fine, and it's fine with many ways of running the PCT. However, when the PCT's -localCheckoutDir is used, such plugins can fail with difficult to understand errors from gulp.

This PR is a hook, much like the existing ones, which works past this problem specifically for sse-gateway and workflow-cps. Following below is some example output of running the PCT against master of workflow-cps.

The issue can also be recreated with sse-gateway, with the results being slightly different. With sse-gateway, the "fixed" PCT run shows a different failure, which would be fixed if I file a PR with this simple change to that plugin. I actually read about that here. Without my change, sse-gateway fails with an identical Error: Cannot find module '../lib/completion' error to the one from workflow-cps.

Example output, before and after this PR

Without this PR:

➜  plugin-compat-tester git:(sse-gateway-hook) ✗ java -jar plugins-compat-tester-cli/target/plugins-compat-tester-cli.jar -reportFile $(pwd)/out/report.xml -workDirectory $(pwd)/tmp/work -includePlugins workflow-cps -war /Users/kshultz/GitHub/unified-release/products/core-mm/target/core-mm-2.235.1.3-SNAPSHOT.war -localCheckoutDir /Users/kshultz/GitHub/workflow-cps-plugin -skipTestCache true

...snip...

[INFO] --- frontend-maven-plugin:1.9.1:yarn (yarn mvnbuild) @ workflow-cps ---
[INFO] Running 'yarn run mvnbuild' in /Users/kshultz/GitHub/plugin-compat-tester/tmp/work/workflow-cps
[INFO] yarn run v0.23.0
[INFO] $ gulp bundle 
[INFO] module.js:338
[INFO]     throw err;
[INFO]     ^
[INFO] 
[INFO] Error: Cannot find module '../lib/completion'
[INFO]     at Function.Module._resolveFilename (module.js:336:15)
[INFO]     at Function.Module._load (module.js:286:25)
[INFO]     at Module.require (module.js:365:17)
[INFO]     at require (module.js:384:17)
[INFO]     at Object.<anonymous> (/Users/kshultz/GitHub/plugin-compat-tester/tmp/work/workflow-cps/node_modules/.bin/gulp:13:18)
[INFO]     at Module._compile (module.js:434:26)
[INFO]     at Object.Module._extensions..js (module.js:452:10)
[INFO]     at Module.load (module.js:355:32)
[INFO]     at Function.Module._load (module.js:310:12)
[INFO]     at Function.Module.runMain (module.js:475:10)
[INFO] error Command failed with exit code 1.
[INFO] info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  6.082 s
[INFO] Finished at: 2020-07-14T17:08:42-04:00
[INFO] ------------------------------------------------------------------------

With this PR:

➜  plugin-compat-tester git:(sse-gateway-hook) ✗ java -jar plugins-compat-tester-cli/target/plugins-compat-tester-cli.jar -reportFile $(pwd)/out/report.xml -workDirectory $(pwd)/tmp/work -includePlugins workflow-cps -war /Users/kshultz/GitHub/unified-release/products/core-mm/target/core-mm-2.235.1.3-SNAPSHOT.war -localCheckoutDir /Users/kshultz/GitHub/workflow-cps-plugin -skipTestCache true

...snip...

[INFO] --- frontend-maven-plugin:1.9.1:yarn (yarn install) @ workflow-cps ---
[INFO] Running 'yarn --mutex network' in /Users/kshultz/GitHub/plugin-compat-tester/tmp/work/workflow-cps
[INFO] yarn install v0.23.0
[INFO] [1/4] Resolving packages...
[INFO] success Already up-to-date.
[INFO] Done in 0.38s.
[INFO] 
[INFO] --- maven-localizer-plugin:1.26:generate (default) @ workflow-cps ---
[INFO] 
[INFO] --- frontend-maven-plugin:1.9.1:yarn (yarn mvnbuild) @ workflow-cps ---
[INFO] Running 'yarn run mvnbuild' in /Users/kshultz/GitHub/plugin-compat-tester/tmp/work/workflow-cps
[INFO] yarn run v0.23.0
[INFO] $ gulp bundle 
[INFO] [17:40:56] Maven project
[INFO] [17:40:56]  - src: src/main/js,src/main/less
[INFO] [17:40:56]  - test: src/test/js
[INFO] [17:40:56] Setting defaults
[INFO] [17:40:56] Bundle will be generated in directory 'target/generated-resources/adjuncts/org/jenkinsci/plugins/workflow/cps' as 'workflow-editor.js'.
[INFO] [17:40:56] Using gulpfile ~/GitHub/plugin-compat-tester/tmp/work/workflow-cps/gulpfile.js
[INFO] [17:40:56] Starting 'bundle'...
[INFO] [17:40:56] Finished 'bundle' after 44 ms
[INFO] Done in 0.75s.

...snip...

[INFO] Results:
[INFO] 
[WARNING] Tests run: 415, Failures: 0, Errors: 0, Skipped: 9
[INFO] 
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  12:43 min
[INFO] Finished at: 2020-07-14T17:53:52-04:00
[INFO] ------------------------------------------------------------------------