Bump derbyVersion from 10.13.1.1 to 10.15.2.0

Bumps `derbyVersion` from 10.13.1.1 to 10.15.2.0.

Updates `derby` from 10.13.1.1 to 10.15.2.0

Updates `derbytools` from 10.13.1.1 to 10.15.2.0

---
updated-dependencies:
- dependency-name: org.apache.derby:derby
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.derby:derbytools
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -75,7 +75,7 @@
     <jackrabbit.version>2.15.4</jackrabbit.version>
     <metrics-core.version>3.1.0</metrics-core.version>
 
-    <derbyVersion>10.13.1.1</derbyVersion>
+    <derbyVersion>10.15.2.0</derbyVersion>
     <httpclient.version>4.5.13</httpclient.version>
     <httpclient.core.version>4.4.15</httpclient.core.version>