Process Plugins in the Order Defined in plugins.txt

[sridamul]

Closes #105
If both -f and -p options are enabled, then the plugins are processed in the order of plugin file first, followed by the plugins passed through -p option.
For Eg:
plugins.txt

git
git-client:1.0.0
jobcacher:2.3.4

java -jar /path/to/jar --plugins login-theme,jobcacher -f path/to/plugin/file --recipes AddPluginsBom -n
would process in order of git, git-client, jobcacher, login-theme

Testing done

Unit tests

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[gounthar]

I tried it in GitPod with a plugins.txt file, and it worked.
Thanks! 🚀

[jonesbusy]

More idiomatic way could be

return loadedPlugins.stream().distinct().collect(Collectors.toCollection(ArrayList::new));