Put Eclipse settings in the root directory.

This enforces that settings are taken into account whichever mean is used to
import the project into Eclipse (manual import, m2e, mvn eclipse:eclipse, ...).

.gitignore

@@ -8,14 +8,15 @@ logs/
 build/
 target/
 
-
-## eclipse ignores (use 'gradle eclipse' to build eclipse projects)
+## eclipse ignores (use 'mvn eclipse:eclipse' to build eclipse projects)
+## The only configuration files which are not ignored are .settings since
+## these files ensure common coding style across Eclipse and IDEA
+## Other files (.project, .classpath) should be generated through Maven which
+## will correctly set the classpath based on the declared dependencies.
 .project
 .classpath
-.settings
 */.project
 */.classpath
-*/.settings
 */eclipse-build
 
 ## netbeans ignores

pom.xml

@@ -896,26 +896,6 @@
                         </lifecycleMappingMetadata>
                     </configuration>
                 </plugin>
-                <plugin>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-eclipse-plugin</artifactId>
-                    <configuration>
-                        <additionalConfig>
-                            <file>
-                                <name>.settings/org.eclipse.jdt.core.prefs</name>
-                                <location>src/eclipse/dot.settings/org.eclipse.jdt.core.prefs</location>
-                            </file>
-                            <file>
-                                <name>.settings/org.eclipse.jdt.ui.prefs</name>
-                                <location>src/eclipse/dot.settings/org.eclipse.jdt.ui.prefs</location>
-                            </file>
-                            <file>
-                                <name>.settings/org.eclipse.core.resources.prefs</name>
-                                <location>src/eclipse/dot.settings/org.eclipse.core.resources.prefs</location>
-                            </file>
-                        </additionalConfig>
-                    </configuration>
-                </plugin>
             </plugins>
         </pluginManagement>
     </build>