remove unused Exceptions in WorkerStorage
equals requires hashCode. No usage of equals could be found so removed from Pair.
UiFileInfo defined compareTo without equals and hashCode.  Since this is needed, switched over to Comparator
null checks ignored in finally block with nullable types.  added transient flag to master info
added transient flag to all servlet fields
set jetty thread count as a config
Merge pull request #489 from dcapwell/findbugscleanup

Findbugscleanup
cleared
Merge pull request #490 from dcapwell/jettyconfigthreads

set jetty thread count as a config
format code
Merge pull request #488 from shimingfei/RemoveUnusedExceptions

remove unused Exceptions in WorkerStorage and format the code
set jetty thread count to 9

Set jetty thread count from 5 to 9 to avoid the bug mentioned in
[TACHYON-196]
Merge pull request #492 from PasaLab/TACHYON-196

[TACHYON-196] Set jetty thread count to 9