Run bazel once to so that it performs post-install extraction (saves …

…~10 seconds on each shard)

Reviewers: naphat

Reviewed By: naphat

Subscribers: changesbot, kylec

Differential Revision: https://tails.corp.dropbox.com/D223418

changes/utils/bazel_setup.py

@@ -12,6 +12,8 @@
 # apt-get update, and try again if it fails first time
 sudo apt-get -y update || sudo apt-get -y update
 sudo apt-get install -y --force-yes %(bazel_apt_pkgs)s
+
+/usr/bin/bazel --nomaster_blazerc --blazerc=/dev/null --batch version
 """.strip()
 
 # We run setup again because changes does not run setup before collecting tests, but we need bazel

tests/changes/models/test_job.py

@@ -53,6 +53,8 @@ def test_autogenerated_commands(self, get_config):
 # apt-get update, and try again if it fails first time
 sudo apt-get -y update || sudo apt-get -y update
 sudo apt-get install -y --force-yes bazel
+
+/usr/bin/bazel --nomaster_blazerc --blazerc=/dev/null --batch version
 """.strip()
 
         sync_encap_expected = """