Bug 1600904 - [lint.yaml] Fix Python 3 related error and the issues that snuck in because of it, r=sylvestre

Differential Revision: https://phabricator.services.mozilla.com/D55798

--HG--
extra : moz-landing-system : lando

.cron.yml

@@ -14,11 +14,11 @@ jobs:
           - mozilla-beta
       when:
           by-project:
+              # No default
               mozilla-beta:
                   - {weekday: 'Monday', hour: 4, minute: 0}
                   - {weekday: 'Wednesday', hour: 4, minute: 0}
                   - {weekday: 'Friday', hour: 4, minute: 0}
-              # No default
 
     - name: nightly-desktop
       job:

taskcluster/ci/config.yml

@@ -448,4 +448,3 @@ mac-notarization:
                     production: security/mac/hardenedruntime/production.entitlements.xml
                     default: security/mac/hardenedruntime/developer.entitlements.xml
             default: ''
-

taskcluster/ci/source-test/python.yml

@@ -322,4 +322,3 @@ condprof:
         files-changed:
             - 'testing/condprofile/condprof**'
             - 'testing/condprofile/setup.py'
-

taskcluster/ci/test/raptor.yml

@@ -57,7 +57,7 @@ raptor-tp6-1-firefox:
     variants: ["fission"]
     try-name: raptor-tp6-1-firefox
     treeherder-symbol: Rap(tp6-1)
-    condprof: True
+    condprof: true
     mozharness:
         extra-options:
             - --test=raptor-tp6-1
@@ -697,7 +697,7 @@ raptor-tp6-1-firefox-cold:
     description: "Raptor tp6-1 cold page-load on Firefox"
     try-name: raptor-tp6-1-firefox-cold
     treeherder-symbol: Rap(tp6-c-1)
-    condprof: True
+    condprof: true
     mozharness:
         extra-options:
             - --test=raptor-tp6-1-cold
@@ -1019,7 +1019,7 @@ browsertime-tp6:
     treeherder-symbol: Btime(tp6)
     max-run-time: 4000
     tier: 3
-    condprof: True
+    condprof: true
     run-visual-metrics:
         by-app:
             chrome: false

taskcluster/ci/test/talos.yml

@@ -413,7 +413,6 @@ talos-motionmark-profiling:
     description: "Talos motionmark with gecko profiling"
     try-name: motionmark-prof
     treeherder-symbol: T-Prof(mm)
-    tier: 2
     run-on-projects: ['mozilla-central', 'try']
     max-run-time: 3600
     tier:

tools/lint/yamllint_/__init__.py

@@ -32,6 +32,7 @@ class YAMLLintProcess(ProcessHandlerMixin):
     def __init__(self, config, *args, **kwargs):
         self.config = config
         kwargs['processOutputLine'] = [self.process_line]
+        kwargs['universal_newlines'] = True
         ProcessHandlerMixin.__init__(self, *args, **kwargs)
 
     def process_line(self, line):