Remove all uses of internal Apache Geode APIs

Current use of internal Apace Geode API's is (use expression: `import org\.apache\.geode.*internal*`):

<img width="1238" alt="Screen Shot 2020-02-20 at 12 43 30 PM" src="https://user-images.githubusercontent.com/5247119/74976983-a720a100-53de-11ea-8e4d-d147b64725c8.png">
