Enhance Logging Usage / Formatting

**** This is a rather large overall change due to logging/formatting changes - Review with care ***

Replace string concatenation with use of {} of slf4j
Properly format spaces back to tabs on newer code
Tomcat tests are flaky, ignore them for time being.
In cases where immediately after creating an object it is then set with some value, it is not necessary to set to null.  Doing so causes slight overhead on the jvm for no real purpose (ie creating object set to null then throwing it away to set new value).  Obviously not likely a big deal in this case and not something the IDE's usually point out.  I believe these are pointed out in check styles or elsewhere.  I forget exactly where I picked up doing this type of cleanup but it was likely the code checkers that noted it.