phosphor-bmc-code-mgmt: srcrev bump 02516d3ff9..991af7ecfb

Adriana Kobylak (2):
      Remove deprecated is_method_error code
      item_updater: Call remove association on delete

(From meta-phosphor rev: b275bbe2313890fe389cd4dd081fd69ff69cbd7f)

Change-Id: I0f9a09f3c669cb29549a0d99325c720fa79afaff
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>