Make more use of Swob for code cleanup
Make more use of Swob for code cleanup

Change-Id: I580135ef7c9545eb2f69ff88b3aafcd8064b81b5

KoreaCloudObjectStorage/swift3,swiftstack/swift3-stackforge,stackforge/swift3,tumf/swift3,swiftstack/swift3-stackforge,stackforge/swift3,tumf/swift3,KoreaCloudObjectStorage/swift3