Restconf issue in ODL with remote Netconf device

I am connecting to Remote Netconf Device and trying to make changes in configuration using ODL.

My Netconf device does not expose schema so have added yang schemas in ODL local and connector xml file as yang module capability.

When I try to use below Restconf url getting some exceptions,

1. http://localhost:8080/restconf/operational/opendaylight-inventory:nodes/node/m10schemanew/yang-ext:mount/

where m10schemanew is identifier for my device
Exception Stacktrace is attached in first issue.txt file

2. http://localhost:8080/restconf/config/opendaylight-inventory:nodes/node/m10schemanew/yang-ext:mount/configuration:configuration/system
with

PUT method and

input:
<system>
<host-name>FooBar123</host-name>
</system>

exception stack trace : Added in attached first issue.txt file in second point

Even though both the above url used to work in older version of ODL.

Please help me out to resolve this issue.