Fixed errors in how the execute goal was hiding parameters for the base class

And made sure that exec is run in the context of the project, which can be different in case of a multi-module pom

Author: DavyLandman

src/main/java/org/rascalmpl/maven/AbstractRascalMojo.java

@@ -380,6 +380,7 @@ protected Process runMain(boolean verbose, String moreClasspath, List<File> srcs
 			.collect(Collectors.joining(" ")));
 
 		ProcessBuilder p = new ProcessBuilder(command);
+		p.directory(proejct.getBasedir());
 
 		if (inheritIO) {
 			// everything merges with the current process' streams

src/main/java/org/rascalmpl/maven/ExecuteRascalMojo.java

@@ -14,9 +14,7 @@
 
 import org.apache.maven.plugins.annotations.LifecyclePhase;
 import org.apache.maven.plugins.annotations.Mojo;
-import org.apache.maven.plugins.annotations.Parameter;
 import org.apache.maven.plugins.annotations.ResolutionScope;
-import org.apache.maven.project.MavenProject;
 
 /**
  * Maven Goal for running local Rascal programs during the maven generate-source phase.
@@ -27,18 +25,7 @@
 @Mojo(name="exec", defaultPhase = LifecyclePhase.NONE, requiresDependencyCollection = ResolutionScope.COMPILE_PLUS_RUNTIME, requiresDependencyResolution = ResolutionScope.COMPILE_PLUS_RUNTIME)
 public class ExecuteRascalMojo extends AbstractRascalMojo
 {
-	@Parameter(defaultValue="${project}", readonly=true, required=true)
-    private MavenProject project;
-
-    @Parameter(property = "mainModule", required=true)
-    private String mainModule = "Main";
-
 	public ExecuteRascalMojo() {
 		super("org.rascalmpl.shell.RascalShell", "exec");
 	}
-
-	@Override
-	protected void setExtraParameters() {
-		extraParameters.put("mainModule", mainModule);
-	}
 }