When Options.max_num_files=-1, non level0 files also by pass table cache

Summary:
This is the part that was not finished when doing the Options.max_num_files=-1 feature. For iterating non level0 SST files (which was done using two level iterator), table cache is not bypassed. With this patch, the leftover feature is done.

Test Plan: make all check; change Options.max_num_files=-1 in one of the tests to cover the codes.

Reviewers: haobo, igor, dhruba, ljin, yhchiang

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D17001

db/table_cache.h

@@ -58,7 +58,7 @@ class TableCache {
   // the table index or blooms are not in memory, this may cause an I/O
   bool PrefixMayMatch(const ReadOptions& options,
                       const InternalKeyComparator& internal_comparator,
-                      uint64_t file_number, uint64_t file_size,
+                      const FileMetaData& file_meta,
                       const Slice& internal_prefix, bool* table_io);
 
   // Evict any entry for the specified file number