Added Salesforce Connector

[parthp2107]

Describe your changes :

I worked on the adding salesforce connector. Fix #360

Type of change :

• New feature

Checklist:

• I have read the CONTRIBUTING document.
• I have performed a self-review of my own.
• I have tagged my reviewers below.
• I have commented on my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• All new and existing tests passed.