Update version number in pom.xml to 2.1.7
Update version number in pom.xml to 2.1.7

yplo6403/dnsjava,wmudge/dnsjava,mohamad-z/dnsjava,draekko/dnsjava,yplo6403/dnsjava,jitsi/dnsjava,mohamad-z/dnsjava,tks-dp/dnsjava,jitsi/dnsjava,dnsjava/dnsjava,wmudge/dnsjava,draekko/dnsjava,tks-dp/dnsjava