Change parallel flag to '-P'

Author: gliptak

src/main/java/org/scalatest/tools/maven/AbstractScalaTestMojo.java

@@ -441,7 +441,7 @@ private List<String> tagsToExclude() {
     }
 
     private List<String> parallel() {
-        return parallel ? singletonList("-c") : Collections.<String>emptyList();
+        return parallel ? singletonList("-P") : Collections.<String>emptyList();
     }
 
     //

src/test/scala/org/scalatest/tools/maven/PluginTest.scala

@@ -107,8 +107,8 @@ final class PluginTest
   }
 
   def testConcurrent {
-    configure(_.parallel = true) should contain("-c")
-    configure(_.parallel = false) should not contain ("-c")
+    configure(_.parallel = true) should contain("-P")
+    configure(_.parallel = false) should not contain ("-P")
   }
 
   def testSuites {