refs #6065 remove tracker plugins from config and cache them instead in a file. Wondering which test will fail...
by including the version number into the cache file we make sure a new file will be created after an update and we should prevent any problems with opcaches
refs #6065 forgot to mark method as static, did not trigger a notice on my PHP
refs #6065 maybe this makes sure to load plugins always in same order in tests? As glob will return files in any order it pleases. It is only a wrapper for libc glob() function
refs #6065 added changelog and fixed some tests
Merge pull request #6072 from piwik/6065_trackerPluginsInCacheFile

dynamically detect tracker plugins and cache them instead of using config