fix default Cassandra port
fix RollupTypeCacher.apply() to support synchronous invocation
Merge pull request #334 from GeorgeJahad/master

Minor bug fixes
Do not include exception in log template

Do not include exception in log string template or the stacktrace will
be lost.
Include the range that rollup failed on

Include the range that rollup failed on so one can find the data in the
db for debugging purposes.
Catch on Exception instead of Throwable

`Throwable` has 2 subclasses: `Exception` and `Error`. According to the
java docs, quote:

    An Error is a subclass of Throwable that indicates serious problems
    that a reasonable application should not try to catch.

http://docs.oracle.com/javase/7/docs/api/java/lang/Error.html
Merge pull request #338 from dlobue/log_rollup_exception_stacktraces

Log rollup exception stacktraces