fix: resolve compatibility issues with Stripe and other Stripe based WordPress plugins

[mehul0810]

Bug Report

User Story

As a user, I want to ensure that there is no plugin conflict with Give core with basic version of Stripe so that the customer site doesn't get broken.

Current Behavior

Currently, we noticed compatibility issues with EDD Stripe add-on and Give 2.5.0+

Expected Behavior

I expect to have no compatibility issue with any Stripe WordPress plugin and Give 2.5.0+

Bug Type

• This bug describes functionality that once worked as expected in version X.X.X.
• This bug describes functionality that never worked as expected.
• I am not sure whether this functionality ever worked as expected.

Acceptance Criteria

• Implement manual installation of Stripe SDK
• Test with EDD Stripe WordPress Plugin
• Test with WP Full Stripe WordPress Plugin
• Test with WP Simple Pay WordPress plugin
• Test it on our staging site to ensure that the patch is working fine.

Related tickets

• https://secure.helpscout.net/conversation/919591815/44557/
• https://secure.helpscout.net/conversation/917962755/44454/
• https://secure.helpscout.net/conversation/917835021/44440/
• https://secure.helpscout.net/conversation/918006937/44459/
• https://secure.helpscout.net/conversation/920025940/44620/

[mikejhale]

@mathetos Did additional testing with Gravity Forms Stripe and worked as expected.

[mehul0810]

Re-opening this issue due to customer reports as per slack discussion https://givewp.slack.com/archives/C0FAGC83C/p1564619203092900