Commits on Oct 31, 2020

1. chore(ci): fix typo in restrict presubmit samples ITs to only snapshot …

   Fixes below error in Java repos when googleapis/synthtool#804 was merged:
   ```
   github/java-bigquerystorage/.kokoro/build.sh: line 81: pushd: {SAMPLES_DIR}: No such file or directory
   ```
   
   Thanks @kolea2 for spotting this in Fusion build logs.
   
   cc @chingor13
   
   Source-Author: Stephanie Wang <stephaniewang526@users.noreply.github.com>
   Source-Date: Mon Oct 26 13:44:04 2020 -0400
   Source-Repo: googleapis/synthtool
   Source-Sha: f68649c5f26bcff6817c6d21e90dac0fc71fef8e
   Source-Link: googleapis/synthtool@f68649c

   

   yoshi-automation committed Oct 31, 2020
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2. chore(java): enable generated-files-bot …

   This bot will comment on pull requests that modify templated files. For java, we configure to read from our 2 synth.metadata files: (primary templates and README)
   
   Source-Author: Jeff Ching <chingor@google.com>
   Source-Date: Fri Oct 30 14:22:02 2020 -0700
   Source-Repo: googleapis/synthtool
   Source-Sha: b19b401571e77192f8dd38eab5fb2300a0de9324
   Source-Link: googleapis/synthtool@b19b401

   

   yoshi-automation committed Oct 31, 2020
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