TMSS-156: implemented TMSSBridge::getActiveSubTasks and TMSSBridge::getFinishingSubTasks as similar as possible for the moment as SAS/OTDB/sql/getTreeGroup_func.sql

TMSS-156: use inverse boolean logic #ifndef DONT_COMPILE_OTDB_AND_PVSS_CODE, so that 'normal' MACScheduler behaviour with OTDB/PVSS is the default, and the devs have the oppotunity to disable OTDB/PVSS code actively by adding  -DDONT_COMPILE_OTDB_AND_PVSS_CODE=true to the cmake cmdline

TMSS-156: made proof-of-concept where TMSSBridge can query for and parse upcoming subtasks, and request a parset. Needs to be further implemented in _updatePlannedList

TMSS-156: use hostname, port, user and pass from configuration file. TODO: replace test user/pass with secret user/pass which is not stored in git