[wip] recipe/promise_plugin: Use system slapos.core

slapos/recipe/promise_plugin.py

@@ -36,21 +36,6 @@ sys.path[0:0] = %(path)s
 
 extra_config_dict = %(config)s
 
-# We want to cleanup all imported modules from slapos namespace, because
-# they will conflict with slapos.core.
-# In fact as slapos.grid is already imported, the promise cannot reimport
-# his own slapos.grid from an updated sys.path. Then all module imports which
-# are not in slapos.core will fail.
-#
-# call reload(slapos) only solve a part of problem because not all modules
-# will be reloaded, and some new modules won't be added.
-# The solution is to delete all cached 'slapos' modules as well as all cached
-# 'pkg_resources' modules which is responsible of namespace declaration.
-# They will be re-imported again using the updated sys.path
-for module in list(sys.modules):
-  if 'slapos' in module or 'pkg_resources' in module:
-    del sys.modules[module]
-
 %(content)s
 '''