Added Demisto Content prefix to release notes (demisto#1029)

Author: dorsha

content-descriptor.json

@@ -1,7 +1,7 @@
 {
   "installDate": "0001-01-01T00:00:00Z",
   "assetId": "REPLACE_THIS_WITH_CI_BUILD_NUM",
-  "releaseNotes": "## Release Notes for version 2.5.0",
+  "releaseNotes": "## Demisto Content Release Notes for version 2.5.0",
   "modified": "REPLACE_THIS_WITH_RELEASE_DATE",
   "ignoreGit": false,
   "releaseDate": "REPLACE_THIS_WITH_RELEASE_DATE",

release_notes.py

@@ -300,7 +300,7 @@ def createFileReleaseNotes(fileName, deleteFilePath):
 def createContentDescriptor(version, assetId, res):
     #time format example 2017 - 06 - 11T15:25:57.0 + 00:00
     date = datetime.datetime.now().strftime("%Y-%m-%dT%H:%M:%S.0+00:00")
-    release_notes = "## Release Notes for version " + version + " (" + assetId + ")" + "\n\n" + res
+    release_notes = "## Demisto Content Release Notes for version " + version + " (" + assetId + ")" + "\n\n" + res
     contentDescriptor = {
         "installDate": "0001-01-01T00:00:00Z",
         "assetId": int(assetId),