Ensures deployment to sonatype only happens on the linux build. (#1676)
Ensures deployment to sonatype only happens on the linux build. (#1676)

Resolves: https://jira.lyrasis.org/browse/FCREPO-3303
escowles/fcrepo4,peichman-umd/fcrepo4,whikloj/fcrepo4,escowles/fcrepo4,peichman-umd/fcrepo4,robyj/fcrepo4,robyj/fcrepo4,whikloj/fcrepo4,robyj/fcrepo4,fcrepo4/fcrepo4,whikloj/fcrepo4,fcrepo4/fcrepo4,robyj/fcrepo4,whikloj/fcrepo4,fcrepo4/fcrepo4,peichman-umd/fcrepo4,escowles/fcrepo4