Simplify m2e lifecycle mapping

[kthoms]

We have several places in pom.xml files that define lifecycle mappings for m2e. These mappings are quite verbose, e.g.

                <plugin>
                    <groupId>org.eclipse.m2e</groupId>
                    <artifactId>lifecycle-mapping</artifactId>
                    <version>1.0.0</version>
                    <configuration>
                        <lifecycleMappingMetadata>
                            <pluginExecutions>
                                <pluginExecution>
                                    <pluginExecutionFilter>
                                        <groupId>
                                            org.codehaus.mojo
                                        </groupId>
                                        <artifactId>
                                            exec-maven-plugin
                                        </artifactId>
                                        <versionRange>
                                            [1.2.1,)
                                        </versionRange>
                                        <goals>
                                            <goal>java</goal>
                                        </goals>
                                    </pluginExecutionFilter>
                                    <action>
                                        <ignore></ignore>
                                    </action>
                                </pluginExecution>
                            </pluginExecutions>
                        </lifecycleMappingMetadata>
                    </configuration>
                </plugin>

With m2e 1.7 this can be simplified. Usually we exclude plugins from mappings which would correspond now with the entry

<?m2e ignore?>

[cdietrich]

see also https://www.eclipse.org/lists/tycho-user/msg08357.html

[cdietrich]

move to 2.22

[cdietrich]

move to 2.24