Working tests for non-Cartesian orbit propagation are still needed.
Partially fixes #403

In interfaces radiationPressureAcceleration and dragAcceleration, and
all their implementations and their tests.

Partially fixes #514

Fixes #536

Fixes #539

Fixes issue #538

Fixes #535

Work In Progress, the flattening is not used yet!

Fixes #534.

Use the Action enum from Hipparchus as all three enum definitions were the same.
Avoid needing to translate enums.

Fixes #506

Fixes #532

Change from T extends EventDetector to T extends AbstractDetector<T>, which
specifies that the with* methods will return an object of the same type.

Fixes #389

Previously if OrekitException.getMessage() threw an exception it would cause
the message and stack trace to be lost. Now the localization and message
formatting code is inside a try block so the message identifier and stack trace
are not lost.

Fixes #530

Thanks to Gowtham Sivaraman for finding the issue.

Fixes #528

Replaced private class BilinearInterpolatingFunction of Saastamoinen
model by the one of Hipparchus.

Previously if DataProvidersManagerTest ran before NetworkCrawlerTest it would
set data filters (which are static) that would interfere with
NetworkCrawlerTest. Now both tests clear filters.

Test do not pass yet.