XML output for ping RPCs

We've updated the junos-rpc-ping YANG module and the corresponding Junos XML RPCs to ensure that the RPC XML output conforms to the YANG schema. As a result, we changed the XML output for the following ping RPCs:

• <ping>—The XML output emits <ping-error-message> and <ping-warning-message> tags instead of <xnm:error> and <xnm:warning> tags.
• <request-ping-ce-ip>—The XML output is enclosed in an <lsping-results> root element.
• <request-ping-ethernet>—The <ethping-results> root tag includes a <cfm-loopback-reply-entry> or <cfm-loopback-reply-entry-rapid> tag for each received response. In earlier releases, a single tag enclosed all responses.
  The XML output includes only application specific error tags and omits <xnm:error> tags.
  The <cfm-loopback-reply-entry-rapid> tag is now reflected in the YANG schema.
• <request-ping-overlay>—The <ping-overlay-results> element includes a new child tag <hash-udp-src-port>.