Upgrade powermock 1.6.6

Author: slandelle

pom.xml

@@ -395,6 +395,6 @@
 		<commons-io.version>2.5</commons-io.version>
 		<commons-fileupload.version>1.3.3</commons-fileupload.version>
 		<privilegedaccessor.version>1.2.2</privilegedaccessor.version>
-		<powermock.version>1.6.4</powermock.version>
+		<powermock.version>1.6.6</powermock.version>
 	</properties>
 </project>