Update sjRPC dependency version for debian package.

debian/control

@@ -8,7 +8,7 @@ Standards-Version: 3.9.1
 
 Package: cc-node
 Architecture: all
-Depends: ${misc:Depends}, ${python:Depends}, python-sjrpc ( >= 13 ), python-psutil, python-daemon
+Depends: ${misc:Depends}, ${python:Depends}, python-sjrpc ( >= 18 ), python-psutil, python-daemon
 Recommends: python-libvirt ( >= 0.8.7-1+sj1 )
 XB-Python-Version: ${python:Versions}
 Description: CloudControl node