add unit tests for glopalpay Connector

[ArjunKarthik]

Feature Description

As part of adding unit tests to existing connectors we are adding test for globalpay

Possible Implementation

add a test file for globalpay connector in the crates/router/tests folder

Have you spent some time to check if this feature request has been raised before?

• [X] I checked and didn't find similar issue

Have you read the Contributing Guidelines?

• [X] I have read the Contributing Guidelines

Are you willing to submit a PR?

Yes I am willing to submit a PR!