SERVER-15062 change redundant branch to invariant
SERVER-15371 SERVER-15062 test election behavior in the TopologyCoordinator
SERVER-15251 tests for FreshnessChecker's ScatterGatherAlgorithm
SERVER-15250 tests for ElectCmdRunner's ScatterGatherAlgorithm
SERVER-13635: honor --storageEngine for small oplog tests
TOOLS-198 allow use-new-tools to switch MSI binary path locations
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into metadata-table