sshpeer: only print out 'running ssh' messages in debug mode (BC) Previously, if another command was run with --verbose, and for whatever reason that invoked sshpeer, we'd get a 'running ssh' message from sshpeer. This extra line would interfere with that command's output and cause dumb parsers to break. For example, hg annotate can be run with --verbose to get full usernames. This, combined with the third-party remotefilelog extension which can cause ssh connections to be created, leads to an extra 'running ssh' line that breaks most parsers. This patch is (BC) because hg pull --verbose will no longer print out exactly what ssh command it is running. No tests are affected by this change.

tests: small refactoring of run-tests' handling of tests list