Upgrade MapDB to 1.0.3

MapDB is out of beta, so it makes sense to upgrade to a release version!

Some API was removed (likely set to reasonable defaults) in the
configuration of the DB. Updated as needed.
Stop overriding surefire argLine

Several things are improved by not overriding argLine:
* apple.awt.UIElement doesn't need to be set as it's set in parent pom
* by overriding this property, we were losing default memory settings
  (Xmx, Xms 512) in the parent pom. This would cause "optimal" settings to
  be determined. This value, based on the environment, might be too low
  for memory-dependent tests (such as the CacheServiceTests). So let's just
  rely on the parent pom's defaults.
* As we are no longer overriding the argLine, we can also now pass
  -DargLine=...  arguments to unit tests, as desired.

Most likely will fix #152 once and for all!

Signed-off-by: Mark Hiner <hinerm@gmail.com>