Usually a nested stack is used that contains the TLS-everywhere bits
(config_settings and metadata_settings). Nested stacks are very
resource intensive. So, instead of doing using nested stacks, this patch
changes that to use a conditional, and output the necessary
config_settings and metadata_settings this way in an attempt to save
resources.
Change-Id: Ib7151d67982957369f7c139a3b01274a1a746c4a