Do not attempt to parse empty RPC/action reply
An RPC or action can legally result in an empty reply,
even if it has some optional content in its schema.
Detect </ok> reply and do not attempt to parse it as
YANG data.
JIRA: NETCONF-568
JIRA: NETCONF-644
Change-Id: I1f0b5c349f418824b9b0b3e1f01f16824b1b8df4
Signed-off-by: Anna Bencurova <Anna.Bencurova@pantheon.tech>
Signed-off-by: Sanjana B <sanjana.b@verizon.com>
Signed-off-by: Tibor Král <tibor.kral@pantheon.tech>
(cherry picked from commit
df25a540e0985695d3d0f93c68a977a4de729329)