PRH test fixes - align simulated Dmaap response to the real one

(real Dmaap response consists of array of escaped event json strings)

Change-Id: I84f1c5ee576b833e40138ce8af8a8558f39e0609
Issue-ID: INT-1100
Signed-off-by: grabinsk <maciej.grabinski@nokia.com>
diff --git a/tests/dcaegen2/prh-testcases/resources/PrhLibrary.py b/tests/dcaegen2/prh-testcases/resources/PrhLibrary.py
index b994261..b3f5f8d 100644
--- a/tests/dcaegen2/prh-testcases/resources/PrhLibrary.py
+++ b/tests/dcaegen2/prh-testcases/resources/PrhLibrary.py
@@ -46,8 +46,7 @@
     @staticmethod
     def create_invalid_notification(json_file):
         output = {}
-        input = json.loads(json_file)[0]
-
+        input = json.loads(json_file)
         output["correlationId"] = PrhLibrary.__extract_correlation_id_value(input)
         output["oamV4IpAddress"] = PrhLibrary.__extract_value_from_pnfRegistrationFields(input, "oamV4IpAddress")
         output["oamV6IpAddress"] = PrhLibrary.__extract_value_from_pnfRegistrationFields(input, "oamV6IpAddress")