Revert "Exclude config file provider tests temporarily (jenkinsci#2275)…

…" (jenkinsci#2278)

Fixed issue jenkinsci#2274 with pull
request jenkinsci#2276

jenkinsci/config-file-provider-plugin#286 fixed
it thanks to @mawinter69 and @rsandell.

This reverts commit 8fe50be.

excludes.txt

@@ -12,8 +12,3 @@ org.jenkinsci.plugins.gitclient.FilePermissionsTest
 
 # TODO tends to run out of memory
 org.jenkinsci.plugins.pipeline.modeldefinition.TriggersTest
-
-# TODO config file provider test fixes for 2.415 and later: https://github.com/jenkinsci/config-file-provider-plugin/pull/286
-org.jenkinsci.plugins.configfiles.ConfigFilesSEC1253Test
-org.jenkinsci.plugins.configfiles.folder.FolderConfigFileActionTest
-org.jenkinsci.plugins.configfiles.sec.Security2002Test