Re-add "fetaure_recursive_conflict" config test

Author: bridadan

tools/test/config/fetaure_recursive_conflict/FEATURE_STORAGE/FEATURE_IPV4/lib1/mbed_lib.json

@@ -0,0 +1,8 @@
+{
+    "name": "lib1",
+    "target_overrides": {
+        "*": {
+            "target.features_add": ["STORAGE"]
+        }
+    }
+}

tools/test/config/fetaure_recursive_conflict/FEATURE_STORAGE/lib2/mbed_lib.json

@@ -0,0 +1,8 @@
+{
+    "name": "lib2",
+    "target_overrides": {
+        "*": {
+            "target.features_add": ["UVISOR"]
+        }
+    }
+}

tools/test/config/fetaure_recursive_conflict/mbed_app.json

@@ -0,0 +1,7 @@
+{
+    "target_overrides": {
+        "*": {
+            "target.features": ["IPV4", "STORAGE"]
+        }
+    }
+}

tools/test/config/fetaure_recursive_conflict/test_data.json

@@ -0,0 +1,5 @@
+{
+    "K64F": {
+        "exception_msg": "Configuration conflict. The feature UVISOR both added and removed." 
+    }
+}