Updated TestFileBasedSource.TestReader so that lines are read properly when running on Windows.

----Release Notes----
[]
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=89422772

Author: chamikaramj

sdk/src/test/java/com/google/cloud/dataflow/sdk/io/FileBasedSourceTest.java

@@ -209,7 +209,9 @@ protected boolean readNextRecord() throws IOException {
       }
       nextOffset += offsetAdjustment;
       isAtSplitPoint = true;
-      currentValue = CoderUtils.decodeFromByteArray(StringUtf8Coder.of(), buf.toByteArray());
+      // When running on Windows, each line obtained from 'readNextLine()' will end with a '\r'
+      // since we use '\n' as the line boundary of the reader. So we trim it off here.
+      currentValue = CoderUtils.decodeFromByteArray(StringUtf8Coder.of(), buf.toByteArray()).trim();
       return true;
     }