Disable new from_environment tests on Dartium and dart2dart.

fromEnvironment doesn't appear to work on these platforms yet.

TBR=scheglov@google.com

Review URL: https://codereview.chromium.org//646213005

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41271 260f80e4-7a28-3924-810f-c04153c831b5
Fix merge resolution in r41267.

Due to an incorrectly resolved merge, r41267 inadvertently
re-introduced the notificationProcessor parameter to Server.start(),
which was removed in r41246.

TBR=brianwilkerson@google.com

Review URL: https://codereview.chromium.org//637283008

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge@41272 260f80e4-7a28-3924-810f-c04153c831b5