Issue #2030743 by yingtho, runeasgar, marcingy, YesCT, damiankloip, larowlan, typhonius, dman, areke, Désiré: Improve tests for user form alters in contact module.

Issue #610076 by fietserwin, yingtho, te-brian, mikeryan, Dave Cohen: Add a primary key to the {taxonomy_index} table and prevent duplicates being inserted.

Issue #2091335 by lostkangaroo, cosmicdreams, batigolix, yingtho, neclimdul: Fix up hook_help for the help module