Core/Tickets: Fix crash in TicketMgr::ResetTickets()
Core/WorldSession: Mitigate DoS attacks

Mitigate DoS attacks like one explained in #10555 by processing a limited number of packets at each WorldSession::Update() call, allowing other WorldSessions to be processed.
100 packets in a single update sound like a reasonable amount.
Updated all values of `gender` column in `creature_model_info`.
Scripted/ScarletMonastery: Fix crash for headless horseman
Core/Creature: Added log/change back to default speed for speed walk / run = 0 (Speed is never zero)
Core/Object: Added more information for MovePosition log
Core: Fix warnings
Core/Maps: Added gameobject case for AddObjectToSwitchList and fixed logic in RemoveAllObjectsInRemoveList
Core/Transports: Added missing include
Core/Transports: Fixed crashes when instance with transports unloads

Closes #11056
DB/Gossip: Added some missing gossips (Source: 5.4.0 sniffs)
Misc: Removed some whitespace
DB/Gameobjects: Added few missing gameobjects templates from 5.4.0 sniffs.
Merge pull request #10989 from Elron103/pullrequests2

Core/Tickets: Fix crash in TicketMgr::ResetTickets()
DB/Conditions: Fix conditions for class trainer npcs, so gossip menus will show up correctly for every class
Merge pull request #11069 from Elron103/pullrequests2

DB/Conditions: Fix conditions for class trainer npcs, so gossip menus will show up correctly for every class
Core/Pet: Allow all pets to swim

closes: #9331
Merge pull request #11070 from gerripeach/pets

Core/Pet: Allow all pets to swim
Core/Group: Fix crash in "Group::GetMembersCount"

closes: #9350
Merge pull request #11071 from gerripeach/group_crash

Core/Group: Fix crash in "Group::GetMembersCount"