Changes the bytes[] conversion done in Bytes and ByteBufferUtils.
Instead of doing check unsafe_aligned available everytime, choose
the best converter at startup.
Conflicts:
hbase-client/src/main/java/org/apache/hadoop/hbase/filter/FuzzyRowFilter.java
hbase-common/src/main/java/org/apache/hadoop/hbase/util/ByteBufferUtils.java
hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
Amending-Author: Andrew Purtell <apurtell@apache.org>