Moved MultimediaViewer jobs from Cloudbees

Created jobs:
browsertests-MultimediaViewer-en.wikipedia.beta.wmflabs.org-linux-chrome
-sauce
browsertests-MultimediaViewer-en.wikipedia.beta.wmflabs.org-linux-firefo
x-sauce
browsertests-MultimediaViewer-en.wikipedia.beta.wmflabs.org-windows_8-in
ternet_explorer-sauce
browsertests-MultimediaViewer-en.wikipedia.beta.wmflabs.org-os_x_10.9-sa
fari-sauce
browsertests-MultimediaViewer-mediawiki.org-linux-firefox-sauce

Deleted jobs:
browsertests-MultimediaViewer-en.wikipedia.beta.wmflabs.org-linux-firefo
x

Paired with: Chris McMahon

Change-Id: Ic76c5e504b091c706dd12a713eb2786ac944e0a9