ACCUMULO-1961 Fix warnings
Merge branch '1.4.5-SNAPSHOT' into 1.5.1-SNAPSHOT
Merge branch '1.5.1-SNAPSHOT' into 1.6.0-SNAPSHOT

Conflicts:
	core/src/main/java/org/apache/accumulo/core/client/mapred/InputFormatBase.java
	core/src/main/java/org/apache/accumulo/core/client/mapreduce/InputFormatBase.java
	core/src/main/java/org/apache/accumulo/core/client/mapreduce/RangeInputSplit.java
	core/src/test/java/org/apache/accumulo/core/client/mapreduce/AccumuloInputFormatTest.java
	server/base/src/main/java/org/apache/accumulo/server/init/Initialize.java
	server/tserver/src/test/java/org/apache/accumulo/tserver/log/MultiReaderTest.java