test/util/mysql: Print out MySQL error when mysql_real_connect() fails
test/common: Allow for MySQL password to be passed in environment
util/mysql: Avoid leaking MYSQL object in case of failure
testsuite: Update README - remove memory leaks already fixed
util/mysql: Print MySQL specific error also in case of mysql_query() failure
Merge pull request #90 from openchange/kamenim/testsuite-and-mysql-fixes

Testsuite and mysql utility functions fixes