ceph_manager: parse osd numbers with dots
ceph_manager: parse osd numbers with dots

This is necessary since wip-dot-names was merged.

SUSE/teuthology,SUSE/teuthology,dmick/teuthology,ktdreyer/teuthology,ivotron/teuthology,SUSE/teuthology,dmick/teuthology,ktdreyer/teuthology,yghannam/teuthology,ceph/teuthology,dreamhost/teuthology,caibo2014/teuthology,robbat2/teuthology,zhouyuan/teuthology,robbat2/teuthology,yghannam/teuthology,caibo2014/teuthology,ivotron/teuthology,ceph/teuthology,michaelsevilla/teuthology,t-miyamae/teuthology,michaelsevilla/teuthology,tchaikov/teuthology,tchaikov/teuthology,t-miyamae/teuthology,dmick/teuthology,dreamhost/teuthology,zhouyuan/teuthology