Fix Java Break Related to memtable bloom bits to size ratio change

Summary: Need to change several more places for the change to fix Java tests

Test Plan:
make jtest
under java, run "make db_bench"

Reviewers: yhchiang, andrewkr, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: leveldb, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D59541

java/benchmark/src/main/java/org/rocksdb/benchmark/DbBenchmark.java

@@ -569,8 +569,7 @@ public class DbBenchmark {
         (Integer)flags_.get(Flag.bloom_locality));
     options.setMinWriteBufferNumberToMerge(
         (Integer)flags_.get(Flag.min_write_buffer_number_to_merge));
-    options.setMemtablePrefixBloomBits(
+    options.setMemtablePrefixBloomSizeRatio((Double) flags_.get(Flag.memtable_bloom_size_ratio));
-        (Integer)flags_.get(Flag.memtable_bloom_bits));
     options.setNumLevels(
         (Integer)flags_.get(Flag.num_levels));
     options.setTargetFileSizeBase(
@@ -1195,10 +1194,10 @@ public class DbBenchmark {
         return Integer.parseInt(value);
       }
     },
-    memtable_bloom_bits(0,"Bloom filter bits per key for memtable.\n" +
+    memtable_bloom_size_ratio(0, "Ratio of memtable used by the bloom filter.\n"
-        "\tNegative means no bloom filter.") {
+            + "\t0 means no bloom filter.") {
       @Override public Object parseValue(String value) {
-        return Integer.parseInt(value);
+        return Double.parseDouble(value);
       }
     },
     cache_numshardbits(-1,"Number of shards for the block cache\n" +

java/src/main/java/org/rocksdb/ColumnFamilyOptions.java

@@ -591,7 +591,7 @@ public class ColumnFamilyOptions extends RocksObject
   @Override
   public ColumnFamilyOptions setMemtablePrefixBloomSizeRatio(
       final double memtablePrefixBloomSizeRatio) {
-    setMemtablePrefixBloomBits(nativeHandle_, memtablePrefixBloomSizeRatio);
+    setMemtablePrefixBloomSizeRatio(nativeHandle_, memtablePrefixBloomSizeRatio);
     return this;
   }
 
@@ -775,7 +775,8 @@ public class ColumnFamilyOptions extends RocksObject
       long handle, long inplaceUpdateNumLocks)
       throws IllegalArgumentException;
   private native long inplaceUpdateNumLocks(long handle);
-  private native void setMemtablePrefixBloomBits(long handle, double memtablePrefixBloomSizeRatio);
+  private native void setMemtablePrefixBloomSizeRatio(
+      long handle, double memtablePrefixBloomSizeRatio);
   private native double memtablePrefixBloomSizeRatio(long handle);
   private native void setBloomLocality(
       long handle, int bloomLocality);