move test to new package structure

...test/java/gov/usgs/earthquake/nshmp/EarthquakesTests.java

src/test/java/gov/usgs/earthquake/nshmp/FaultsTests.java

src/test/java/gov/usgs/earthquake/nshmp/MathsTests.java

.../java/gov/usgs/earthquake/nshmp/data/DoubleDataTests.java

...st/java/gov/usgs/earthquake/nshmp/data/IndexingTests.java

...ava/gov/usgs/earthquake/nshmp/data/InterpolatorTests.java

...va/gov/usgs/earthquake/nshmp/data/IntervalArrayTests.java

...ava/gov/usgs/earthquake/nshmp/data/IntervalDataTests.java

...va/gov/usgs/earthquake/nshmp/data/IntervalTableTests.java

...a/gov/usgs/earthquake/nshmp/data/IntervalVolumeTests.java

...ov/usgs/earthquake/nshmp/data/MutableXySequenceTests.java

.../java/gov/usgs/earthquake/nshmp/data/XySequenceTests.java

.../java/gov/usgs/earthquake/nshmp/eq/fault/FaultsTests.java

...ake/nshmp/eq/fault/surface/DefaultGriddedSurfaceTest.java

...arthquake/nshmp/eq/fault/surface/RuptureFloatingTest.java

.../java/gov/usgs/earthquake/nshmp/eq/model/LoaderTests.java

...va/gov/usgs/earthquake/nshmp/eq/model/ModelInfoTests.java

...gov/usgs/earthquake/nshmp/eq/model/SourceConfigTests.java

...ava/gov/usgs/earthquake/nshmp/eq/model/peer/PeerTest.java

...hquake/nshmp/eq/model/peer/PeerTestArgumentProviders.java