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The log_level in Swift is fixed to INFO. The patch make it changeable according to the value of "openstack_logging_debug". When "openstack_logging_debug" is "False", the log_level is set to "INFO". It is default value. Otherwise, the log_level is set to "DEBUG". Closes-Bug: #1777982 Change-Id: I62f430abd8f332cc2ece56a6733776fa03b10f77 Signed-off-by: tone.zhang <tone.zhang@arm.com>