match: Fix propertiesChangedNamespace method
match: Fix propertiesChangedNamespace method

It should use arg0namespace instead of argN in the
propertiesChangedNamespace method.

Signed-off-by: George Liu <f124e69123cb985598dfa856ba74cb3263194267@inspur.com>
Change-Id: Ia73a30c875ebbe9ec070094ee78085e9fd596ddf

openbmc/sdbusplus,openbmc/sdbusplus,openbmc/sdbusplus,openbmc/sdbusplus