Refactored test data creation to use promise chain
Fixed bug where models were still being added to collections.
Refactored code to reduce repeated function calls.
Refactored tests to use helper function
Refactored database and route to no longer use the admin table. Added columns for admin access in the user table.
Merge pull request #127 from gnauhnoj/feat/adminUserRefactor

User/Admin DB Refactor, Test Refactor, need to change db config file and add user-pet model