phosphor-host-ipmid: srcrev bump 4026e446d6..8550b60fc2

Kirill Pakhomov (1):
      Fix units for fan RPM sensor

Richard Marian Thomaiyar (1):
      SetUserName to return success - for same user name

(From meta-phosphor rev: 8cdc6b2448d98a70551c8ff8aff93145c09b863b)

Change-Id: I4759f7b06c83b3a477ed2ceb979458f0e6e855ca
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>