Establish mockserver with fixtures for backend API responses

Change-Id: I011e529655e9ef63180c004f97b26c3b1f6f1e34
diff --git a/.gitignore b/.gitignore
index 28825ba..59a0ef1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@
 !/.gitignore
 plugin/target
 dependency-reduced-pom.xml
+/sandbox
+/Sandbox
\ No newline at end of file