meta2v2: add local flag check on some requests (test purpose).

Change-Id: Idd014ae1089b2d5ab5487a87cd943ca9244a6f95
Several fixes and improvements

JSON fixed for service_info.
Finer decache in resolver.
m2v2_remote_touch_content fixed.
m2v2 does not generates events when disabled.
cluster/event lighter traces when writing an event
server now installs a previously missing header

Change-Id: Ib145ba973ad7d9f3810c4c0fa4f30f1be1ff4639