Failing to do this caused a mysterious uncaught exception in gengal,
with no explanation printed. This turned out to be caused by the
'CONFIGURATION_LAYERS: missing ":"' exception thrown in configmgr,
which was caused by the unencoded space confusing the parsing of the
CONFIGURATION_LAYERS thing.

Change-Id: I9c91819906c2e0dd434d9f96a04bc14c0e0408ed