Task: Separate resource client into individual managers per sql operators

[melonrush13]

We want to separated the sqlclient/resourceclient into 5 operator managers (1 manager per sql operator w/ individual tests) to have a more consistent, clean code base for when we update the sql controller to the generic controller.

Pre task work for ticket #451

Done Criteria
The following resources should have their own managers, go file, and test files inside the sql resourcemanager, as well as test files for each mocked manager.

• SqlServerManager
• SqlDBManager
• SqlFirewallManager
• SqlFailoverGroup
• SqlUser

User Story Reference
#7