Revert "Made the command executor work for plugin and addons. New system has a command/subcommand mode, and re-builds the args minus a subcommand so we can always expect args at the same index"

This reverts commit 9e31c2f5eab389b4108292b23a6e01b4a0b4832b.
Adding config to disable metrics
Adding null check to test_conn
Merge branch '1.3'