Reduce the container Memory allocation in default LaunchDescriptor

During the transition to using settings for "container memory" in each back-end module's default LaunchDescriptor (FOLIO-1729 FOLIO-2185), instead of using folio-ansible group_vars to specify -Xmx Java option (FOLIO-2241 FOLIO-2242), we needed to temporarily raise the container memory allocation to 130% of the old -Xmx setting (FOLIO-2250).

Now that the transition is complete, these levels need to be lowered again.

The developers of each back-end module now need to determine the default container memory allocation, and adjust their configuration.

At ModuleDescriptor path: $.launchDescriptor.dockerArgs.HostConfig.Memory
See documentation.

As noted there, these levels are appropriate for running a basic system such as the "folio-snapshot" reference environment. So this default container memory setting should be as low as possible.