* updating extension api docs for 5.0
Signed-off-by: Jim Ehrismann <jehrismann@mirantis.com>

* beefed up migration details
Signed-off-by: Jim Ehrismann <jehrismann@mirantis.com>

* address review comments
Signed-off-by: Jim Ehrismann <jehrismann@mirantis.com>

* updated cluster features docs (#3094)
Signed-off-by: Jim Ehrismann <jehrismann@mirantis.com>

* revert extension package-lock.json files again
Signed-off-by: Jim Ehrismann <jehrismann@mirantis.com>