HPFEEDS: Switched to environment variables

- Define Settings in .hpfeeds_settings.sh
- Settings get exported as env vars
- Ansible looks them up and updates the values in the tpot.yml file
- ews.cfg: Switched to env vars

cloud/.hpfeeds_settings.sh

@@ -0,0 +1,8 @@
+myENABLE="false"
+myHOST="host"
+myPORT="port"
+myCHANNEL="channels"
+myIDENT="user"
+mySECRET="secret"
+myCERT="false"
+myFORMAT="json"