Support to enable VOLTHA in cord-tester.
VOLTHA can now be started by cord-tester by specifying voltha_loc in manifest file.
voltha_intf specifies the interface for voltha to listen.
A sample manifest-voltha.json can be modified accordingly before starting cord-tester.
Changed the default olt_type to simulated_olt in volthaTest configuration json.
This would enable testing of voltha tests.
Fix indentation broken in voltha tests earlier.

Change-Id: Ia18b870c83dcb60c15c07f8602579494f32457c9
diff --git a/src/test/setup/manifest-voltha.json b/src/test/setup/manifest-voltha.json
new file mode 100644
index 0000000..d73b5d2
--- /dev/null
+++ b/src/test/setup/manifest-voltha.json
@@ -0,0 +1,11 @@
+{
+    "onos_instances": 1,
+    "olt": true,
+    "start_switch": true,
+    "onos_image": "onosproject/onos:latest",
+    "log_level" : "INFO",
+    "jvm_heap_size" : "1G",
+    "karaf_version" : "3.0.8",
+    "voltha_loc" : "/home/ubuntu/voltha/incubator/voltha",
+    "voltha_intf" : "enp0s9"
+}