Demo of long-term time integration instability

Primarily modifies the bowl-radial example problem to show the
instability that appears during long time integrations.
Add missing source from instability demo
Add check for test_topo to allow flagging
Change name of test_topo function
Minor tweaks, moving example to tests
Move long time int test to tests
Add more bathy tests
Refined test
Move data classes to geoclaw module

Also moved appropriate parameters in Fortran source.  The bowl-radial
example is not yet working.
Convert to moved data objects
Demo of long-term time integration instability

Primarily modifies the bowl-radial example problem to show the
instability that appears during long time integrations.
Minor tweaks, moving example to tests
Switching to non-monolithic data classes
Add refinement module reference
Failure is failing again
Changed to single step test
Change test for better look
Add custom topo module
Update makefile to new flagging
Fix random init condition