Added Pretty Display method and BSTRecursiveGenericTests.java (#6621)

* added binarysearchtree

* added binarysearchtree

* updated

* updated the test values

* updated build issues

* updated

* updated

* updated

* updated

* updated

* updated

* updated

* added pretty display method

* added pretty display method

* updated pretty Display and added BSTRecursiveGenericTest.java

* updated pretty Display and added BSTRecursiveGenericTest.java

* updated pretty Display and added BSTRecursiveGenericTest.java

* updated pretty Display and added BSTRecursiveGenericTest.java

* updated pretty Display and added BSTRecursiveGenericTest.java

* added pretty display method

* updated pretty Display and added BSTRecursiveGenericTest.java

* updated pretty Display and added BSTRecursiveGenericTest.java

* updated pretty Display and added BSTRecursiveGenericTest.java

---------

Co-authored-by: Krishnan M <2318467@cognizant.com>
Co-authored-by: Deniz Altunkapan <93663085+DenizAltunkapan@users.noreply.github.com>