TT#66582 Change the dependency on prosody, it does not work with later versions

This package needs modifications to adapt to the versions in Debian buster
(0.11), it is unknown if it works in 0.10, so to be on the safe side change the
dependency to the known version in which it works.

Change-Id: I4441732fe98c3951a259a2a2b3dfdc482db20bd1
(cherry picked from commit 3f092150b7)

debian/control

@@ -19,6 +19,7 @@ Depends:
  lua-sec,
  ngcp-system-tools-ce | ngcp-system-tools,
  prosody (>= 0.9.8~),
+ prosody (<< 0.10~),
  ${misc:Depends},
 Description: ngcp modules for the prosody Jabber/XMPP server
  This package provides modules for the Prosody Jabber/XMPP server