Improve performance by removing fallback search text generation

[gunthercox]

This pull request makes a number of changes, the results of which should namely be:

1. search_text and search_in_response_to values are now only generated when getting responses, and functionality to generate these values as a part of storage adapters, logic adapters, and other classes has been removed. This removed a number of unnecessary and inconsistent calls, and also opens up the ability for search text generation to be parallelized (in future pull requests).
2. While making these changes I noticed a an inconsistency with the searching process in general that was resulting in text matches from not being found.