MB-20822: Print correct value for vb_%d:num_erroneous_entries_erased

'num_erroneous_entries_erased' was incorrectly printing the total size
of the failover table, and not the number of elements which have been
removed.

Change-Id: I7bbd75ca4db962cba257a1883ce3635b475287c7
Reviewed-on: http://review.couchbase.org/69132
Reviewed-by: Jim Walker <[email protected]>
Reviewed-by: Trond Norbye <[email protected]>
Tested-by: buildbot <[email protected]>

Author: daverigby

src/failover-table.cc

@@ -237,7 +237,8 @@ void FailoverTable::addStats(const void* cookie, uint16_t vbid,
         add_casted_stat(statname, table.size(), add_stat, cookie);
         checked_snprintf(statname, sizeof(statname),
                          "vb_%d:num_erroneous_entries_erased", vbid);
-        add_casted_stat(statname, table.size(), add_stat, cookie);
+        add_casted_stat(statname, getNumErroneousEntriesErased(), add_stat,
+                        cookie);
 
         table_t::iterator it;
         int entrycounter = 0;