Fixes for the handling of NaN values (issue #2867).
added the filemetafieldvalue init to the other constructor
Merge branch 'develop' of github.com:IQSS/dvn into develop

Conflicts:
	src/DVN-ingest/src/edu/harvard/iq/dvn/ingest/statdataio/impl/plugins/rdata/RDATAFileReader.java