LS Rename using new analysis

[MikhailArkhipov]

Rename needs information on all documents, so this entails to

• Find definition of the symbol being renamed LS: Goto definition using analysis #567
• Get dependencies of the module that contains the definition Subsystem to analyze import dependencies and provide order of analysis #432
• Run lightweight analysis on the dependencies not analyzed yet. Lightweight means ignoring library imports for faster search since symbol being renamed is in the user code.

[MikhailArkhipov]

Heavily depends on dependency search and resolution and specific imports mode.