Thanks to Hank Grabowski.

Fixes issue #366.

Previously EventHandler.init() was not called. Now it is called by
AbstractDetector.init() and similarly for Fields. Added a test case.

Fixes #471

Allow an OrekitException to be thrown from EventHandler.init() like the other
methods.

Fixes issue #352.

Fixes issue #398.

Fixes issue #411.

Fixes issue #462.

There is still a problem when the Sun crosses the orbital plane during
a noon/midnight turn. This case is rare but does happen.
This needs to be investigated further.

The tests almost all work, except for beta crossing cases in Galileo and
GPS.

The reference fortran program computes the eclipse times from the first
call within eclipse, and reuses this in subsequent calls. Orekit design
choice is to avoid stateful attitude modes, so we redo the computation
on each call, which is not  problem since the computation are very
lightweight. So we cleared the fortran arrays while generating the
reference data.