Add test for applications search by name and owner

[nisan-abeywickrama]

Purpose

As identified by [1], the admin user should be enable to retrieve applications based on the owner or application name. This PR introduces a test case to validate the behaviour of applications search through the super tenant and other tenants.

Implementation

Introduce a new test case which checks the application search using owner and name for each super tenant and other tenants.

The validation is done under 2 possibilities,

• Search application based on name or owner using super tenant.
• Search application based on name or owner using wso2 tenant.

[1] - wso2/api-manager#3100