last test clean ups with creator detection tests (for 3.0)

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/databind/deser/InnerClassDeserTest.java

@@ -16,7 +16,7 @@ static class Dog
       public Brain brain;
 
       public Dog() { }
-      public Dog(String n, boolean thinking) {
+      protected Dog(String n, boolean thinking) {
           name = n;
           brain = new Brain();
           brain.isThinking = thinking;

src/test/java/com/fasterxml/jackson/databind/objectid/TestObjectIdSerialization.java

@@ -91,7 +91,7 @@ protected static class IdWrapperCustom
         public ValueNodeCustom node;
 
         public IdWrapperCustom() { }
-        public IdWrapperCustom(int id, int value) {
+        protected IdWrapperCustom(int id, int value) {
             node = new ValueNodeCustom(id, value);
         }
     }
@@ -104,7 +104,7 @@ protected static class ValueNodeCustom {
         public int getId() { return id; }
 
         public ValueNodeCustom() { this(0, 0); }
-        public ValueNodeCustom(int id, int value) {
+        protected ValueNodeCustom(int id, int value) {
             this.id = id;
             this.value = value;
         }

src/test/java/com/fasterxml/jackson/databind/struct/TestBackRefsWithPolymorphic.java

@@ -178,7 +178,7 @@ static class StringPropertyImpl
     {
         private String m_value;
 
-        public StringPropertyImpl(String name, String value) {
+        protected StringPropertyImpl(String name, String value) {
             super(name);
             m_value = value;
         }