[Bug Fix] Fix Issue with Database::ReserveName

[Kinglykrab]

Description

• If a bot or NPC is created prior to a character being created, they may end up with the same name.
• This causes issues when a bot is spawned because it will crash any player with that same name in the zone.
• NPCs with the same name will get the 000 identifier instead of the player, which could cause issues.

Type of change

• Bug fix

Checklist

• I have tested my changes
• I have performed a self-review of my code. Ensuring variables, functions and methods are named in a human-readable way, comments are added only where naming of variables, functions and methods can't give enough context.
• I own the changes of my code and take responsibility for the potential issues that occur

[catapultam-habeo]

This PR fails to check content database in a multi-tenant deployment.