MB-7085: update vbucket map for new bucket's vbucket maps
MB-7085: update vbucket map for new bucket's vbucket maps

When vbucket map is generated or inferred from vbucket files we need
to add it to vbucket map history.

That's same fix as was made in:
ca70cf68949ba552ce56a6229098906d56d9fa69 but lost in 2.0 janitor
refactoring.

Change-Id: I5af7fd195cf39627b3d61285b8bd9356183d0c2d
Reviewed-on: http://review.couchbase.org/22288
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Reviewed-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>
Tested-by: Aliaksey Artamonau <3c875bcfb3adf2a65b2ae7686ca921e6c9433147@gmail.com>

ceejatec/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,t3rm1n4l/ns_server,pavel-blagodov/ns_server,daverigby/ns_server,nimishzynga/ns_server,membase/ns_server,mschoch/ns_server,nimishzynga/ns_server,membase/ns_server,pavel-blagodov/ns_server,vzasade/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,nimishzynga/ns_server,pavel-blagodov/ns_server,mschoch/ns_server,daverigby/ns_server,ceejatec/ns_server,ceejatec/ns_server,nimishzynga/ns_server,membase/ns_server,membase/ns_server,membase/ns_server,nimishzynga/ns_server,daverigby/ns_server,pavel-blagodov/ns_server,mschoch/ns_server,membase/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,vzasade/ns_server,daverigby/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,ceejatec/ns_server,mschoch/ns_server,ceejatec/ns_server,mschoch/ns_server,vzasade/ns_server,vzasade/ns_server