Initial support for true ADM output (content type application/x-adm).

Elimiate the JSON "results" wrapper from API calls. Rename
DisplayFormat -> OutputFormat, TEXT -> ADM. Cleaned up some output and
added some useful comments. Fixed a few latent bugs in testdriver string
comparison routines. Refactored HTTP error handling in TestsUtils. Had
to update many expected test results.

Change-Id: I2d7ead038512455b2ab7844021cb62222400447b
Reviewed-on: http://fulliautomatix.ics.uci.edu:8443/137
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Ian Maxon <imaxon@uci.edu>
Reviewed-by: Till Westmann <westmann@gmail.com>
diff --git a/asterix-app/src/test/resources/metadata/results/basic/meta08.adm b/asterix-app/src/test/resources/metadata/results/basic/meta08.adm
index cadf1c4..4504221 100644
--- a/asterix-app/src/test/resources/metadata/results/basic/meta08.adm
+++ b/asterix-app/src/test/resources/metadata/results/basic/meta08.adm
@@ -1,2 +1,3 @@
-{ "GroupName": "DEFAULT_NG_ALL_NODES", "NodeNames": {{ "nc1", "nc2" }}, "Timestamp": "Mon Sep 17 12:31:45 PDT 2012" }
-{ "GroupName": "MetadataGroup", "NodeNames": {{ "nc1" }}, "Timestamp": "Mon Sep 17 12:31:45 PDT 2012" }
+[ { "GroupName": "DEFAULT_NG_ALL_NODES", "NodeNames": {{ "nc1", "nc2" }}, "Timestamp": "Mon Sep 17 12:31:45 PDT 2012" }
+, { "GroupName": "MetadataGroup", "NodeNames": {{ "nc1" }}, "Timestamp": "Mon Sep 17 12:31:45 PDT 2012" }
+ ]