If network calls to retrieve ports and floating IPs take too long,
then the project > instances page cannot be loaded. This config
allows disabling the network calls when loading the page with
minor side-effects, as a workaround to avoid downtime while other
performance optimizations can be done on the side to allow
the page the load so the workaround is no longer needed.
Closes-bug: #2051003
Related-bug: #2045168
Change-Id: Iedad6ef48cbe0b776594f4ad8276d3d713cd360c
(cherry picked from commit 6b93e9dd87)
(cherry picked from commit 45a86be78a)
(cherry picked from commit 1ec179bb9d)
(cherry picked from commit 9e2ae8e65b)
(cherry picked from commit b2af81e75d)
7eb985778c