MB-22046: forestdb_dump --key must work on deleted keys too
MB-22046: forestdb_dump --key must work on deleted keys too

Don't dump full header if a specific key or specific kv store
name is given. This is to aid testing code which is just
examining if a given key made it to the storage end.
Search by meta if search by key fails so that deleted keys
can be point searched too.

Change-Id: I460f663d5d7eab3ac89f814c12fb1be3c78c11ed
Reviewed-on: http://review.couchbase.org/71618
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: abhinav dangeti <d73ef2279de6577f7bf081737ee47554bbb7dc82@couchbase.com>

wurikiji/forestdb,couchbase/forestdb,wurikiji/forestdb,couchbase/forestdb