[build.webkit.org] Rename slavename to workername in steps.py. This is for two purposes: 1) Preparing to upgrade buildbot 2) Using more inclusive naming
Created attachment 411915 [details] Patch
Committed r268768: <https://trac.webkit.org/changeset/268768> All reviewed patches have been landed. Closing bug and clearing flags on attachment 411915 [details].
<rdar://problem/70504631>