AvalancheSchedulerSvc: Fix undefined output ordering.

Use std::map instead of std::unordered_map for algosDependenciesMap, so that the output will be printed in a well-defined order.

• [2018-03-15 08:07] Validation started with lhcb-gaudi-merge#450
• [2018-03-16 00:05] Validation started with lhcb-gaudi-head-py3#94
• [2018-03-16 00:07] Validation started with lhcb-tdr-test#90
• [2018-03-16 00:08] Validation started with lhcb-gaudi-head#1800
• [2018-03-16 08:03] Validation started with lhcb-gaudi-head#1801

assigned to @clemenci

changed milestone to %v30r2

added bug fix label

approved this merge request

mentioned in commit d71e1c6b

merged