Bump docker-maven-plugin from 0.29.0 to 0.31.0

Bumps [docker-maven-plugin](https://github.com/fabric8io/docker-maven-plugin) from 0.29.0 to 0.31.0.
- [Release notes](https://github.com/fabric8io/docker-maven-plugin/releases)
- [Changelog](https://github.com/fabric8io/docker-maven-plugin/blob/master/doc/changelog.md)
- [Commits](https://github.com/fabric8io/docker-maven-plugin/compare/v0.29.0...v0.31.0)

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

build-parent/pom.xml

@@ -286,7 +286,7 @@
                 <plugin>
                     <groupId>io.fabric8</groupId>
                     <artifactId>docker-maven-plugin</artifactId>
-                    <version>0.29.0</version>
+                    <version>0.31.0</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-javadoc-plugin</artifactId>

integration-tests/keycloak-authorization/pom.xml

@@ -189,7 +189,6 @@
                     <plugin>
                         <groupId>io.fabric8</groupId>
                         <artifactId>docker-maven-plugin</artifactId>
-                        <version>0.28.0</version>
                         <configuration>
                             <images>
                                 <image>

integration-tests/oidc-code-flow/pom.xml

@@ -214,7 +214,6 @@
                     <plugin>
                         <groupId>io.fabric8</groupId>
                         <artifactId>docker-maven-plugin</artifactId>
-                        <version>0.28.0</version>
                         <configuration>
                             <images>
                                 <image>

integration-tests/oidc/pom.xml

@@ -195,7 +195,6 @@
                     <plugin>
                         <groupId>io.fabric8</groupId>
                         <artifactId>docker-maven-plugin</artifactId>
-                        <version>0.28.0</version>
                         <configuration>
                             <images>
                                 <image>