chore: update common templates

This PR was generated using Autosynth. 🌈

Commits in this repo since last synth:


<details><summary>Log from Synthtool</summary>

```
synthtool > Executing /tmpfs/src/git/autosynth/working_repo/synth.py.
On branch autosynth
nothing to commit, working tree clean
HEAD detached at FETCH_HEAD
nothing to commit, working tree clean
.github/ISSUE_TEMPLATE/bug_report.md
.github/ISSUE_TEMPLATE/feature_request.md
.github/ISSUE_TEMPLATE/support_request.md
.github/PULL_REQUEST_TEMPLATE.md
.github/release-please.yml
.kokoro/build.bat
.kokoro/build.sh
.kokoro/coerce_logs.sh
.kokoro/common.cfg
.kokoro/continuous/common.cfg
.kokoro/continuous/dependencies.cfg
.kokoro/continuous/integration.cfg
.kokoro/continuous/java11.cfg
.kokoro/continuous/java7.cfg
.kokoro/continuous/java8-osx.cfg
.kokoro/continuous/java8-win.cfg
.kokoro/continuous/java8.cfg
.kokoro/continuous/lint.cfg
.kokoro/continuous/propose_release.cfg
.kokoro/continuous/propose_release.sh
.kokoro/continuous/samples.cfg
.kokoro/dependencies.sh
.kokoro/linkage-monitor.sh
.kokoro/nightly/common.cfg
.kokoro/nightly/dependencies.cfg
.kokoro/nightly/integration.cfg
.kokoro/nightly/java11.cfg
.kokoro/nightly/java7.cfg
.kokoro/nightly/java8-osx.cfg
.kokoro/nightly/java8-win.cfg
.kokoro/nightly/java8.cfg
.kokoro/nightly/lint.cfg
.kokoro/nightly/samples.cfg
.kokoro/presubmit/clirr.cfg
.kokoro/presubmit/common.cfg
.kokoro/presubmit/dependencies.cfg
.kokoro/presubmit/integration.cfg
.kokoro/presubmit/java11.cfg
.kokoro/presubmit/java7.cfg
.kokoro/presubmit/java8-osx.cfg
.kokoro/presubmit/java8-win.cfg
.kokoro/presubmit/java8.cfg
.kokoro/presubmit/linkage-monitor.cfg
.kokoro/presubmit/lint.cfg
.kokoro/presubmit/samples.cfg
.kokoro/release/bump_snapshot.cfg
.kokoro/release/bump_snapshot.sh
.kokoro/release/common.cfg
.kokoro/release/common.sh
.kokoro/release/drop.cfg
.kokoro/release/drop.sh
.kokoro/release/promote.cfg
.kokoro/release/promote.sh
.kokoro/release/publish_javadoc.cfg
.kokoro/release/publish_javadoc.sh
.kokoro/release/snapshot.cfg
.kokoro/release/snapshot.sh
.kokoro/release/stage.cfg
.kokoro/release/stage.sh
.kokoro/trampoline.sh
CODE_OF_CONDUCT.md
CONTRIBUTING.md
LICENSE
README.md
codecov.yaml
java.header
license-checks.xml
renovate.json
synthtool > Wrote metadata to synth.metadata.

```
</details>

.kokoro/build.sh

@@ -62,14 +62,21 @@ integration)
     bash .kokoro/coerce_logs.sh
     ;;
 samples)
-    mvn -B \
-      -Penable-samples \
-      -DtrimStackTrace=false \
-      -Dclirr.skip=true \
-      -Denforcer.skip=true \
-      -fae \
-      verify
-    bash .kokoro/coerce_logs.sh
+    if [[ -f samples/pom.xml ]]
+    then
+        pushd samples
+        mvn -B \
+          -Penable-samples \
+          -DtrimStackTrace=false \
+          -Dclirr.skip=true \
+          -Denforcer.skip=true \
+          -fae \
+          verify
+        bash .kokoro/coerce_logs.sh
+        popd
+    else
+        echo "no sample pom.xml found - skipping sample tests"
+    fi
     ;;
 clirr)
     mvn -B -Denforcer.skip=true clirr:check

renovate.json

@@ -54,6 +54,13 @@
       "semanticCommitType": "build",
       "semanticCommitScope": "deps"
     },
+    {
+      "packagePatterns": [
+        "^com.google.cloud:libraries-bom"
+      ],
+      "semanticCommitType": "chore",
+      "semanticCommitScope": "deps"
+    },
     {
       "packagePatterns": [
         "^com.google.cloud:google-cloud-"

synth.metadata

@@ -1,11 +1,25 @@
 {
-  "updateTime": "2020-02-01T09:13:31.413508Z",
+  "updateTime": "2020-02-21T23:10:46.787999Z",
   "sources": [
+    {
+      "git": {
+        "name": ".",
+        "remote": "https://github.com/googleapis/java-shared-config.git",
+        "sha": "1dfe2847cbd18a015e555585ea4e5ef779af29ce"
+      }
+    },
+    {
+      "git": {
+        "name": "synthtool",
+        "remote": "rpc://devrel/cloud/libraries/tools/autosynth",
+        "sha": "706a38c26db42299845396cdae55db635c38794a"
+      }
+    },
     {
       "template": {
         "name": "java_library",
         "origin": "synthtool.gcp",
-        "version": "2019.10.17"
+        "version": "2020.2.4"
       }
     }
   ]