DB/Misc: More event fixes

* Scripts repeating event between High Overlord Saurfang and Garrosh Hellscream in Warsong Hold
* Scripts repeating event between Chieftain Wintergale, Durm Icehide and Sage Aeire at Taunka'le Village

* A few texts for reward/accepting of quests
* On Agro texts for several creatures, even though these still need scripting with abillities
* A run-time error
* A bit of additional script for Watcher Leesa'oh to prevent npc bugging out (no npc flags) caused by sai not running if no player in grid and if player disappears will cause npc to remain without npc flags, as the sai to restore flags wont run from script if no player there, at start of script, script will set phase 1 with ooc to restore flags in that phase.
[TW357] Core/Players: Already complete quests shouldn't turn failed
[TW358] Scripts/Quests: Prevent starting Grizlee event if it's already running (solves the issue with many Engineer "Overspark" spawns)
DB/Misc: Missing Spawns

Respawn the following creatures as tc had considerably less spawns of them than should have done

* Tua'kea Crab Trap 
* Nerub'ar Victim 
* Giant Tidecrawler
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
Merge branch 'master' of https://github.com/TrueWoW/TrinityCore into ghbb