Use system properties to set DEBUG_ADDRESS and LOG_LEVEL

[ckunki]

IntegrationTestSetup.java sets constant values for DEBUG_ADDRESS and LOG_LEVEL.

properties.put("DEBUG_ADDRESS", "127.0.0.1:3001");
properties.put("LOG_LEVEL", "ALL");

Please consider to remove these lines and propose using the system properties supported by exasol/test-db-builder-java#103 in the documentation (either user_guide or developer_guide).