osmo-trap2cgi: Fix script installation and dependencies

* Install systemd file with debian
* Depend on python3-aiohttp in python3-osmopy-utils as it is required
  for osmo-trap2cgi

Related: SYS#4399
Sponsored-by: On-Waves ehf
Change-Id: I6add5f37b63dd5fcfdefe0459b539e0050d03897

debian/control

@@ -31,7 +31,7 @@ Description: Python code (not only) for testing of Osmocom programs
 
 Package: python3-osmopy-utils
 Architecture: all
-Depends: ${python3:Depends}, ${misc:Depends}, python3-osmopy-libs, python3-twisted, python3-treq
+Depends: ${python3:Depends}, ${misc:Depends}, python3-osmopy-libs, python3-twisted, python3-treq, python3-aiohttp
 Description: Python code (not only) for testing of Osmocom programs
  .
  This package contains the Python 3 version of osmopy utils.

debian/python3-osmopy-utils.osmo-trap2cgi.service

@@ -0,0 +1 @@
+../contrib/systemd/osmo-trap2cgi.service