This PR provides a more efficient data fetcher so that public field strategy does not have to perform reflective lookups when we have already cached the method / field

So given:

1. Use reflection to find a publicly accessible getter method - if successful store result in the method cache to save on future reflection operations
2. If (1) fails reflection is again used to find a non-public getter method - if successful the result of this is stored in the method cache to save on future reflection operations
3. If (2) fails reflection is used to find a publicly accessible field - if successful the result is stored in field cache.
4. Finally, if (1), (2), or (3) fail - the field is stored in a negative cache, and null is returned

We now will skip steps 1) and 2) for public fields and we will skip 1) for non public fields.

This will improve the secondary and tertiary lookup performance.

See #1812