deps: update dependency com.google.cloud.samples:shared-configuration to v1.0.15

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
com.google.cloud.samples:shared-configuration	patch	1.0.14 -> 1.0.15

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Release Notes

GoogleCloudPlatform/java-repo-tools

v1.0.15

Compare Source

• Move some stuff around (in prep for a change to release process) pom.xml's
• Add an exclude filter for SpotBugs. (disable the Java 11 surprise)
• Don't fail on SpotBugs issues for now
• add PMD reporting
• Don't fail on PMD issues for now.

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[codecov]

Codecov Report

Merging #128 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #128   +/-   ##
=========================================
  Coverage     76.82%   76.82%           
  Complexity      530      530           
=========================================
  Files            42       42           
  Lines          3318     3318           
  Branches        212      212           
=========================================
  Hits           2549     2549           
  Misses          626      626           
  Partials        143      143

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