Add Zehr nifH database #1263

Job	Run time
Choose nextflow versions to test against depending on target branch	1s
nf-test (latest-everything, test, docker)	24m 3s
nf-test (latest-everything, test_single, docker)	5m 18s
nf-test (latest-everything, test_fasta, docker)	3m 15s
nf-test (latest-everything, test_failed, docker)	14m 39s
nf-test (latest-everything, test_multi, docker)	9m 50s
nf-test (latest-everything, test_reftaxcustom, docker)	8m 7s
nf-test (latest-everything, test_doubleprimers, docker)	8m 52s
nf-test (latest-everything, test_iontorrent, docker)	7m 19s
nf-test (latest-everything, test_novaseq, docker)	3m 47s
nf-test (latest-everything, test_pacbio_its, docker)	9m 40s
nf-test (latest-everything, test_sintax, docker)	18m 7s
nf-test (latest-everything, test_pplace, docker)	11m 28s
	2h 4m 26s

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