[z2328] Fix (Disable) HoT stacking

Stacking of Healing over Time buffs was enabled in 2.0.1; so disable for classic

Signed-off-by: Schmoozerd <schmoozerd@cmangos>
[z2329] Implement spell 17009

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>
[z2330] add triggered_spell_id 23402 to HandleOverrideClassScriptAuraProc (Nefarian Priest Classcall: Corrupted Healing) Patch by hennors

Signed-off-by: hennors <e-fowl@gmx.de>
Merge branch 'master' into testing