.toStrin() for the 2 independent Pair classes (PityTest framework should not depend on jniAdapter)

src/java/foundation/pEp/jniadapter/Pair.java

@@ -10,5 +10,11 @@ public class Pair<F, S> {
         first = f;
         second = s;
     }
+
+    public String toString() {
+        String ret="";
+        ret += "'" + first.toString() + "' : '" + second.toString() + "'";
+        return ret;
+    }
 }
 

test/java/foundation/pEp/pitytest/utils/Pair.java

@@ -24,5 +24,11 @@ public class Pair<K, V> {
         key = f;
         value = s;
     }
+
+    public String toString() {
+        String ret="";
+        ret += "'" + key.toString() + "' : '" + value.toString() + "'";
+        return ret;
+    }
 }