Merge branch 'master' into zheilbron/asterix_msr_demo

Conflicts:
	asterix-app/src/test/resources/runtimets/testsuite.xml
	asterix-external-data/src/main/java/edu/uci/ics/asterix/external/dataset/adapter/FileSystemBasedAdapter.java
	asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/MetadataNode.java