nga-east adjustment and variant updates

src/main/java/gov/usgs/earthquake/nshmp/calc/InputList.java

src/main/java/gov/usgs/earthquake/nshmp/gmm/Gmm.java

src/main/java/gov/usgs/earthquake/nshmp/gmm/NgaEast.java

...test/java/gov/usgs/earthquake/nshmp/gmm/NgaEastTests.java

src/test/resources/gmm/nga-east-results.csv