Updating stored binarys

[cdondrup]

After #60 was fixed I tried to update the stored binary and ran into a similar error:

Updating stored default for /ground_hog/model
/usr/local/lib/python2.7/dist-packages/pymongo/collection.py:487: RuntimeWarning: couldn't encode - reloading python modules and trying again. if you see this without getting an InvalidDocument exception please see http://api.mongodb.org/python/current/faq.html#does-pymongo-work-with-mod-wsgi
  check_keys, self.__uuid_subtype), safe)
Traceback (most recent call last):
  File "/home/cdondrup/ros-ws/src/ros_datacentre/ros_datacentre/scripts/config_manager.py", line 225, in <module>
    server = ConfigManager()
  File "/home/cdondrup/ros-ws/src/ros_datacentre/ros_datacentre/scripts/config_manager.py", line 117, in __init__
    defaults_collection.update(existing,{"$set":{"value":val}})
  File "/usr/local/lib/python2.7/dist-packages/pymongo/collection.py", line 487, in update
    check_keys, self.__uuid_subtype), safe)
bson.errors.InvalidDocument: Cannot encode object: <xmlrpclib.Binary instance at 0x21ab8c0>
[INFO] [WallTime: 1405590963.002627] Thu Jul 17 10:56:02 [conn1] end connection 127.0.0.1:58556
[config_manager-3] process has died [pid 20484, exit code 1, cmd /home/cdondrup/ros-ws/src/ros_datacentre/ros_datacentre/scripts/config_manager.py __name:=config_manager __log:=/home/cdondrup/.ros/log/8dd13814-0d98-11e4-9e7a-902b34d5fb37/config_manager-3.log].
log file: /home/cdondrup/.ros/log/8dd13814-0d98-11e4-9e7a-902b34d5fb37/config_manager-3*.log

Deleting the parameter from the config DB manually and reinserting it worked fine but the direct update via the config manager does yield above error. Do you have an idea what might cause this @cburbridge ?

[cburbridge]

The above should fix this, please let me know the next problem :-)