Update CONTRIBUTING.md

Author: authorjapps

CONTRIBUTING.md

@@ -42,10 +42,12 @@ ISSUE-14 # SSL enabled http client
 ## Write Unit tests
 - For any feature you develop or include in a pull request (PR), ensure it is covered by unit tests.
 - All unit tests should be placed in their respective package folders.
+- Follow existing tests and mimic the pattern
 
 ## Write Integration tests
 - For any feature you develop or include in a pull request (PR), ensure it is also covered by integration tests as well.
 - All integration tests should be placed under the [integrationtests](https://github.com/authorjapps/zerocode/tree/master/core/src/test/java/org/jsmart/zerocode/integrationtests) parent folder.
+- Follow existing tests and mimic the pattern
 
 ## Note
 Any contribution submitted by an author for inclusion in this repository shall be licensed under this [LICENSE](https://github.com/authorjapps/zerocode/blob/master/LICENSE)