* Changes resmoke.py to propagate --storageEngineCacheSizeGB as
--inMemorySizeGB when running with the InMemory storage engine.
* Changes the mongo shell to propagate
TestData.storageEngineCacheSizeGB as --inMemorySizeGB when running
with the InMemory storage engine.
* Sets --storageEngineCacheSizeGB=4 when running with the InMemory
storage engine in Evergreen.
This suite contains tests that are unusually susceptible to availability of machine resources; therefore, this suite is always run with --jobs=1 via Evergreen config.