Don't use @component for injecting MavenSession

This fixes the following warning emitted by Maven Plugin Tools:

    Deprecated @component annotation for 'session' field in
    org.fedoraproject.xmvn.mojo.JavadocMojo: replace with
    @parameter( defaultValue = "${session}", readonly = true )

Author: mizdebsk

xmvn-mojo/src/main/java/org/fedoraproject/xmvn/mojo/JavadocMojo.java

@@ -66,12 +66,12 @@ public class JavadocMojo
     @Component
     private ProjectDependenciesResolver resolver;
 
-    @Component
-    private MavenSession session;
-
     @Component
     private Configurator confugurator;
 
+    @Parameter( defaultValue = "${session}", readonly = true )
+    private MavenSession session;
+
     @Parameter( defaultValue = "${reactorProjects}", readonly = true, required = true )
     private List<MavenProject> reactorProjects;