NACM data read/write PATHS do not work with CLI and mount

[olofhagsand]

Also, the NACM+PATHS+CLI support is sketchy as well
see clicon/clixon#468
The general case, NACM+MOUNT for NETCONF/RESTCONF seems OK (see #62)

[olofhagsand]

Temporary workaround for set using "load" as follows.
Example set command (should but does not work):

# set devices device openconfig1 config interfaces interface x config mtu 1600

Workaround uisng load:

load merge xml
      <config>
         <devices xmlns="http://clicon.org/controller">
           <device>
             <name>openconfig1</name>
             <config>
               <interfaces xmlns="http://openconfig.net/yang/interfaces">
                 <interface>
                   <name>x</name>
                   <config>
                     <mtu>1600</mtu>
                   </config>
                 </interface>
               </interfaces>
             </config>
           </device>
         </devices>
     </config>