Merge branch 'checkstyle-tests' into 'master'

include test directory in checkstyle

See merge request !3

.idea/checkstyle-idea.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CheckStyle-IDEA">
+    <option name="configuration">
+      <map>
+        <entry key="active-configuration" value="HTTP_URL:https://gitlab.gistools.geog.uni-heidelberg.de/giscience/big-data/ohsome/parent/raw/2.2/ohsome-codestyle/src/main/resources/checkstyle-google-ohsome.xml:ohsome Google Checks" />
+        <entry key="checkstyle-version" value="8.29" />
+        <entry key="copy-libs" value="false" />
+        <entry key="location-0" value="BUNDLED:(bundled):Sun Checks" />
+        <entry key="location-1" value="BUNDLED:(bundled):Google Checks" />
+        <entry key="location-2" value="HTTP_URL:https://gitlab.gistools.geog.uni-heidelberg.de/giscience/big-data/ohsome/parent/raw/2.2/ohsome-codestyle/src/main/resources/checkstyle-google-ohsome.xml:ohsome Google Checks" />
+        <entry key="property-2.org.checkstyle.google.suppressionfilter.config" value="" />
+        <entry key="property-2.org.checkstyle.google.suppressionxpathfilter.config" value="" />
+        <entry key="scan-before-checkin" value="false" />
+        <entry key="scanscope" value="JavaOnlyWithTests" />
+        <entry key="suppress-errors" value="false" />
+      </map>
+    </option>
+  </component>
+</project>

pom.xml

@@ -11,7 +11,7 @@
     <parent>
         <groupId>org.heigit.ohsome</groupId>
         <artifactId>ohsome-parent</artifactId>
-        <version>2.4</version>
+        <version>2.5</version>
     </parent>
 
     <dependencies>