ceph: Add makeWrapper to dependencies and nativeBuildInputs

The ceph-mgr daemon needs to know the location of cephs own-made python modules for some of the modules
that you can enable for it.
With wrapProgram, a wrapper is added that sets the proper pythonpath environment variable for the ceph-mgr
daemon so its modules can find the ceph python modules

(cherry picked from commit a9a7580)

pkgs/tools/filesystems/ceph/generic.nix

@@ -5,7 +5,7 @@
 , openldap, lttngUst
 , babeltrace, gperf
 , cunit, snappy
-, rocksdb
+, rocksdb, makeWrapper
 
 # Optional Dependencies
 , yasm ? null, fcgi ? null, expat ? null
@@ -97,6 +97,7 @@ let
     ps.pecan
     ps.prettytable
     ps.webob
+    ps.cherrypy
 	]);
 
 in
@@ -114,7 +115,7 @@ stdenv.mkDerivation {
 
   nativeBuildInputs = [
     cmake
-    pkgconfig which git python2Packages.wrapPython
+    pkgconfig which git python2Packages.wrapPython makeWrapper
     (ensureNewerSourcesHook { year = "1980"; })
   ];
 
@@ -159,6 +160,7 @@ stdenv.mkDerivation {
 
   postFixup = ''
     wrapPythonPrograms
+    wrapProgram $out/bin/ceph-mgr --set PYTHONPATH $out/lib/python2.7/site-packages
   '';
 
   enableParallelBuilding = true;