* Fixed float type of mssql to be float
* Many tests where postgres test was not actually ran at all
* Migrations to be mssql compatible
Mssql driver doesn't handle if multiple queries are sent to same transaction concurrently.
* Prevented mssql failing when invalid schema builder was executed by accident
Instead of trying to generate sql from broken schema calls, just make exception to leak before query compiling is started
* Fixed mssql trx rollback to always throw an error
Also modified some connection test query to be mssql compatible
* Fixed various bugs from MSSQL driver to make tests run
* Fixed mssql unique index to be compatible with other dialect implementations
* Enable running mssql tests on CI
* Test for #2588
* Updated tests to not be dependend on tables left from previous test rans
* Trying to make mssql server work on travis
