pipelines: dont continue on error for corefx tests, increase timeout

Author: adaggarwal

.vsts.pipelines/jobs/ci-linux.yml

@@ -106,8 +106,8 @@ jobs:
       du -h $(rootDirectory) | sort -h | tail -n 50
     displayName: Run unit tests
     condition: and(succeeded(), eq(variables['runUnitTests'], true))
-    timeoutInMinutes: 80
-    continueOnError: true
+    timeoutInMinutes: 120
+    continueOnError: false
 
   # Create tarball.
   - script: |