BUG-2017 Fix possible concurrent modification ex in config subsystem

Change-Id: I879118cee8967edf14e24e8af93945d95bbc9fbe
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
(cherry picked from commit 166f257203c1f2b5b77b0ac68441b7ced72a0b25)
BUG 2047 - HTTP GET - no returning error message

Error message was added to NormalizedNodeXmlBodyWriter.

Change-Id: I43914eaa62149b66303cef956f73e694fae9217f
Signed-off-by: Jozef Gloncak <jgloncak@cisco.com>
(cherry picked from commit 4f2ea61562a35ae6ced742ef9f26722109551630)
BUG 1966 - change message logging level (info -> trace)

Change-Id: Idff363361f5d283edf25ac656a519bc8232a9393
Signed-off-by: Jozef Gloncak <jgloncak@cisco.com>
(cherry picked from commit 340fd8391afab33b8ca5f0a13b694e166264d377)
BUG-2207 Make reconnect promise reconnect even if session was dropped during negotiation

Change-Id: I58adc2e42bb8ce09bfb8b5cd214a91300bb2bbb0
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
(cherry picked from commit f1124e95b6b1b4a6b8b8661bdd78aa74a6977b55)
Merge "BUG 2047 - HTTP GET - no returning error message" into stable/helium
Merge "BUG-2017 Fix possible concurrent modification ex in config subsystem" into stable/helium
Merge "BUG 1966 - change message logging level (info -> trace)" into stable/helium
Merge "BUG-2207 Make reconnect promise reconnect even if session was dropped during negotiation" into stable/helium