Add Graphiti SWTBot test plugin

* Move DTP with invalid image provider from ui tests to bot tests where
it is actually used
* Made plugin wizard test more stable

Change-Id: I5becaf4499c911f7442ab5a9ede80a641773b294
diff --git a/tests/org.eclipse.graphiti.bot.tests/.project b/tests/org.eclipse.graphiti.bot.tests/.project
index 421dfc3..39a7ba1 100644
--- a/tests/org.eclipse.graphiti.bot.tests/.project
+++ b/tests/org.eclipse.graphiti.bot.tests/.project
@@ -25,8 +25,14 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.m2e.core.maven2Builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
+		<nature>org.eclipse.m2e.core.maven2Nature</nature>
 		<nature>org.eclipse.pde.PluginNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.pde.api.tools.apiAnalysisNature</nature>