logging: remove spaces in entry definition

phosphor-logging / journald does not allow a space in entry
headers.  Change "FOO = %s" entry definitions to "FOO=%s".

Tested: After change observe logging entries using `journalctl
--output json-pretty` and see the FILENAME appear in an entry.

  "FILENAME" : "/usr/share/phosphor-virtual-sensor/virtual_sensor_config.json",

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iff035554db5e65c54cceb23cf203d72872ad1455
1 file changed