[BEAM-1495] NaN should be considered in L3-Binning
(cherry picked from commit 4a27a6616efcdbf5100baf4a6a8d61775994935e)

Conflicts:
	beam-binning2/pom.xml
	beam-binning2/src/main/java/org/esa/beam/binning/aggregators/AggregatorAverage.java
	beam-binning2/src/main/java/org/esa/beam/binning/aggregators/AggregatorPercentile.java
	beam-binning2/src/main/resources/module.xml
[BEAM-1495] NaN should be considered in L3-Binning - bugfix
(cherry picked from commit 8416f87)