Add env variables for mysql settings in tests

environment variables and their defaults are:

````
MYSQL_HOST : localhost
MYSQL_PORT : 3306
MYSQL_USER : root
MYSQL_PASSWORD : root
MYSQL_DATABASE : ufrontormtest
````
ex:
  
````
MYSQL_HOST="localhost" MYSQL_PORT="3306" MYSQL_USER="admin" MYSQL_PASSWORD="goodpassword" MYSQL_DATABASE="ufront_orm" ./testAll.sh
````


this merge also includes a minor refactoring of `testAll.sh`  
to add `$HAXE_COMPILER_PORT`