Consuming hybrid concurrent upsert tests
Merge pull request #728 from khawkins/hybrid_concurrent_upsert_tests

Consuming hybrid concurrent upsert tests
Converting HybridPluginTestApp tests to XCUnit
Merge pull request #729 from khawkins/hybrid_xctests

Converting HybridPluginTestApp tests to XCUnit
In progress: Adding SalesforceSDKManager
In progress: more SDK manager
Minor changes
Adding some validation, errors