Added unit tests to configvalue class

public/biopet-framework/src/test/scala/nl/lumc/sasc/biopet/core/config/ConfigValueTest.scala

+package nl.lumc.sasc.biopet.core.config
+
+import java.io.File
+
+import org.scalatest.Matchers
+import org.scalatest.mock.MockitoSugar
+import org.scalatest.testng.TestNGSuite
+import org.testng.annotations.Test
+
+/**
+ * Created by pjvan_thof on 1/8/15.
+ */
+class ConfigValueTest extends TestNGSuite with MockitoSugar with Matchers {
+  val index = ConfigValueIndex("", Nil, "")
+  @Test def testAs: Unit = {
+    ConfigValue(index, index, "bla").asString shouldBe "bla"
+    ConfigValue(index, index, 1).asInt shouldBe 1
+    ConfigValue(index, index, 1.0).asDouble shouldBe 1.0
+    ConfigValue(index, index, List("bla")).asList shouldBe List("bla")
+    ConfigValue(index, index, true).asBoolean shouldBe true
+    ConfigValue(index, index, Map("1" -> 1)).asMap shouldBe Map("1" -> 1)
+    ConfigValue(index, index, List("bla")).asStringList shouldBe List("bla")
+    ConfigValue(index, index, List("bla")).asFileList shouldBe List(new File("bla"))
+  }
+
+  @Test def testToString: Unit = {
+    ConfigValue(index, index, "bla", true).toString.getClass.getSimpleName shouldBe "String"
+  }
+}