Only split top module

Author: remingtonc

src/cisco_gnmi/xr.py

@@ -338,6 +338,5 @@ def parse_xpath_to_gnmi_path(self, xpath, origin=None):
                 origin = None
             else:
                 # module name
-                origin, xpath = xpath.split(":")
-
+                origin, xpath = xpath.split(":", 1)
         return super(XRClient, self).parse_xpath_to_gnmi_path(xpath, origin)