kindergarten-garden: clarify test names

For the custom garden tests it wasn't very clear that the students will
be sorted in alphabetial order before being assinged their plants. This
has been added to the test names to make it more clear.

exercises/kindergarten-garden/src/test/java/KindergartenGardenTest.java

 
     @Ignore("Remove to run test")
     @Test
-    public void customStudentGardenFirstStudent() {
+    public void customStudentGardenFirstStudentInAlphabeticalOrder() {
         String[] studentArray = {"Samantha", "Patricia", "Xander", "Roger"};
         String student = "Patricia";
         String plants = "VCRRGVRG\nRVGCCGCV";
 
     @Ignore("Remove to run test")
     @Test
-    public void customStudentGardenSecondStudent() {
+    public void customStudentGardenSecondStudentInAlphabeticalOrder() {
         String[] studentArray = {"Samantha", "Patricia", "Xander", "Roger"};
         String student = "Roger";
         String plants = "VCRRGVRG\nRVGCCGCV";
 
     @Ignore("Remove to run test")
     @Test
-    public void customStudentGardenThirdStudent() {
+    public void customStudentGardenThirdStudentInAlphabeticalOrder() {
         String[] studentArray = {"Samantha", "Patricia", "Xander", "Roger"};
         String student = "Samantha";
         String plants = "VCRRGVRG\nRVGCCGCV";
 
     @Ignore("Remove to run test")
     @Test
-    public void customStudentGardenFourthStudent() {
+    public void customStudentGardenFourthStudentInAlphabeticalOrder() {
         String[] studentArray = {"Samantha", "Patricia", "Xander", "Roger"};
         String student = "Xander";
         String plants = "VCRRGVRG\nRVGCCGCV";