Add `--no-mount tmp` for singularity destination in tests

and for embedded pulsar tests.

test/integration/embedded_pulsar_singularity_job_conf.yml

@@ -13,6 +13,8 @@ execution:
       runner: pulsar_embed
       singularity_enabled: true
       singularity_required: true
+      # Since tests run in /tmp/ , we apparently need to forbid the default mounting of /tmp
+      singularity_run_extra_arguments: '--no-mount tmp'
 
 tools:
 - class: local

test/integration/singularity_job_conf.yml

@@ -10,6 +10,8 @@ execution:
     local_singularity:
       runner: local
       singularity_enabled: true
+      # Since tests run in /tmp/ , we apparently need to forbid the default mounting of /tmp
+      singularity_run_extra_arguments: '--no-mount tmp'
     local_upload:
       runner: local