phosphor-snmp: srcrev bump c3600d86bc..d560529eb7

Manojkiran Eda (1):
      Add OWNERS file

Patrick Williams (1):
      use Create interface from phosphor-dbus-interfaces

Change-Id: I2005ae3af1c72dcfb5e585d21db698c46b64d1be
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>