neoppod: Pin unpinned eggs

Reported by Julien

software/neoppod/software-common.cfg

@@ -130,6 +130,8 @@ transaction = 1.7.0
 zodbpickle = 0.6.0
 zodbtools = 0.0.0.dev4
 cython-zstd = 0.2
+python-dateutil = 2.7.3
+pyasn1 = 0.4.3
 
 # Required by:
 # slapos.toolbox==0.71