[LIBCLOUD-569] Removing the overloaded constructor from the rimuhosting base class.

Rimu uses gzip'ed responses but the overloaded constructor was not calling the decompress function resuuulting in a MalformedResponseError. All functionality in overloaded constructor already existed in the base clase.

Closes #303

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
Removing ex_ from the front of vps_parameters to avoid overwrites of server memory values.