Discovery: RenameLocalVariablesToCamelCase does not rename all applicable names.

[traceyyoshima]

Issue:
Namespace and the location of valid identifiers may differ between languages. RenameLocalVariablesToCamelCase contains logic limiting changes to valid Java locations to prevent unexpected results. JavaScript allows properties to be declared with keywords that change the applicable scope of the named variable let vs. var. Additionally, some JavaScript trees contain identifiers that should be renamed that would not be valid in Java. The "invalid" identifiers are not renamed, which results in incorrect code.