Add resources to gradle, jmeter, mockito and play framework

* Adding content to Gradle.md

* Modify 100-gradle.md for commit

* Add content for JMeter.md

* Adding content to mocking.md

* Adding content to framework.md

* Adding resources to all the commit files

* Update content/roadmaps/110-java/content/102-java-build-tools/100-gradle.md

* Update content/roadmaps/110-java/content/103-java-web-frameworks/102-play-framework.md

* Update content/roadmaps/110-java/content/107-testing-java-apps/100-mocking.md

* Update content/roadmaps/110-java/content/107-testing-java-apps/107-jmeter.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/110-java/content/102-java-build-tools/100-gradle.md

@@ -1 +1,6 @@
-# Gradle
+# Gradle
+
+Gradle is an open-source build automation tool that helps software engineers to test, build, and release high-performance software products. In addition, Gradle also supports multi-language development. Currently, the supported languages for Gradle include Java, Kotlin, Groovy, Scala, C/C++, and JavaScript.
+
+<ReferenceGroupTitle>Reference Resource</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeTest='Official Website' href='https://gradle.org/'>Gradle Website</BadgeLink>

content/roadmaps/110-java/content/103-java-web-frameworks/102-play-framework.md

@@ -1 +1,6 @@
-# Play framework
+# Play Framework
+
+Play Framework is a high-productivity web application framework that allows the model-view-controller pattern. It is written in Scala but can also be used for other programming languages that are compiled and run on the JVM. e.g.Java.
+
+<ReferenceGroupTitle>Reference Resource</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeTest='Official Website' href='https://www.playframework.com/'>Play Framework Website</BadgeLink>

content/roadmaps/110-java/content/107-testing-java-apps/100-mocking.md

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-# Mocking
+# Mocking
+
+Mocking removes external dependencies from a unit test to create a sense of an entire controlled environment. The traditional method of mocks involves mocking all other classes that interact with the class we want to test. The common targets for mocking are:
+
+- Database connections
+- Web services
+- Slow Classes
+- Classes with side effects
+- Classes with non-deterministic behavior
+
+<ReferenceGroupTitle>Reference Resource</ResourceGroupTitle>
+<BadgeLink colorScheme='purple' badgeTest='Visit' href='https://site.mockito.org/'>Mockito - Mocking Framework for Java</BadgeLink>

content/roadmaps/110-java/content/107-testing-java-apps/107-jmeter.md

@@ -1 +1,6 @@
-# Jmeter
+# JMeter
+
+Apache JMeter is an Apache project that can be used as a load testing tool for analyzing and measuring the performance of a variety of services, with a focus on web applications.
+
+<ReferenceGroupTitle>Reference Resource</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeTest='Official Website' href='https://jmeter.apache.org/'>Apache JMeter Website</BadgeLink>