ISPN-4317 Optimize server test suite
 * all tests for remote queries use the same server
 * removed unnecessary test cases for the suppress-state-transfer tests and merged hotrod and memcached cases
 * merged single-node jdbc tests
 * added proper server killing (a small arquillian extension by Martin which was forgotten during the migration)
 * moved the Unstable category from class level to the failing method in ExampleConfigsTests
 * removed some server starts from TransportStackConfigurationIT test