Added new Java Course (#5614)

* Added new Java Course

* made necessary changes

* fixed access note

courses/free-courses-en.md

@@ -400,6 +400,7 @@
 * [Java Programming: Solving Problems with Software](https://www.coursera.org/learn/java-programming) - (Coursera)
 * [Java tutorial for beginners](https://youtube.com/playlist?list=PLZPZq0r_RZOMhCAyywfnYLlrjiVOkdAI1) - Bro Code (YouTube)
 * [Learn how to program: Java](https://www.learnhowtoprogram.com/java-june-2017) - Epicodus Inc.
+* [Learn Java](https://www.sololearn.com/learning/1068) - Sololearn *(email address required)*
 * [Object-Oriented programming with Java, part I](https://moocfi.github.io/courses/2013/programming-part-1/)
 * [Object-Oriented programming with Java, part II](https://moocfi.github.io/courses/2013/programming-part-2/)
 * [Princeton Algorithms, Part 1](https://www.coursera.org/course/algs4partI)