bugzillaId-720: instability of MariaDB test cases: MaxScale + MariaDB 10

This is import of http://bugs.mariadb.com/show_bug.cgi?id=720

MariaDB test cases are unstable in case of MaxScale and MariaDB 10 Master/Slave backend.

Test case executes a number of test cases from MariaDB test suite in the loop.
The first test set execution is usually ok, but second and next are FAILED.

Tests are available https://github.com/mariadb-corporation/maxscale-system-test/tree/master/Hartmut_tests/maxscale-mysqltest

(https://github.com/mariadb-corporation/maxscale-system-test/tree/master/Hartmut_tests/maxscale-mysqltest/t - queries and https://github.com/mariadb-corporation/maxscale-system-test/tree/master/Hartmut_tests/maxscale-mysqltest/r expected results).

Test console outputs:

http://jenkins.engskysql.com:8088/job/Execute_system_test/5222/console
http://jenkins.engskysql.com:8088/view/Test/job/Execute_system_test/5223/console