Adding fix for dbSNP 144
Adding fix for dbSNP 144

144 has "NotOn" identifiers which caused get_snp_from_dbsnp_file to fail
hms-dbmi/exac_browser,hms-dbmi/exac_browser,pontikos/uclex_browser,konradjk/exac_browser,macarthur-lab/gnomad_browser,pontikos/uclex_browser,macarthur-lab/gnomad_browser,konradjk/exac_browser,pontikos/uclex_browser,macarthur-lab/gnomad_browser,macarthur-lab/gnomad_browser,hms-dbmi/exac_browser,pontikos/uclex_browser,konradjk/exac_browser,pontikos/uclex_browser,macarthur-lab/gnomad_browser