Code review fixes:
- Added tests for product_license, server_connection_string, and server API / class files
- Added tests for mlk assignment
- Fixed server_connection_string code
Converted some double-quote strings to single-quote
Added 'require spec_helper' to .rspec file, so you don't need to do the require in every single spec file
Moved client code to their appropriate locations in Org & Computer API files