[3.3.5a][ICC/Professor Putricide] Volatile Ooze Eruption fix

by @ManuFe and @Rushor; closes #12336

In the existing source, the rooting aura is removed after the explosion,
therefore the knockback effect does not work because the player is still rooted.
By swapping these 2 lines, the aura is removed, then the explosion happens.

Result: rooting is removed before the knockback effect is cast on the player.

src/server/scripts/Northrend/IcecrownCitadel/boss_professor_putricide.cpp

@@ -1060,8 +1060,8 @@ class spell_putricide_ooze_eruption_searcher : public SpellScriptLoader
                 uint32 adhesiveId = sSpellMgr->GetSpellIdForDifficulty(SPELL_VOLATILE_OOZE_ADHESIVE, GetCaster());
                 if (GetHitUnit()->HasAura(adhesiveId))
                 {
-                    GetCaster()->CastSpell(GetHitUnit(), SPELL_OOZE_ERUPTION, true);
                     GetHitUnit()->RemoveAurasDueToSpell(adhesiveId, GetCaster()->GetGUID(), 0, AURA_REMOVE_BY_ENEMY_SPELL);
+                    GetCaster()->CastSpell(GetHitUnit(), SPELL_OOZE_ERUPTION, true);
                 }
             }