Simplify database_connection_url

* does not expects dynamic scoping.
* does not uses eval.

Change-Id: I5ba4e5b7ffaabbb3c2bddadf9e53a2875de8b7c0
Standardize repository locations

* The variables pointing to repositories were not using the GIT_BASE for
github.com
* Some repositories were missing the .git tail

Change-Id: I551179bed90c04682e8a22985241a4bddca23351
Small Refactors

Rename TOP_DIR to THIS_DIR, change the order of variable definitions.

Change-Id: I96c12c5102e658ec76ab5176c3207fb641dae078
Merge "Standardize repository locations"
Merge "Simplify database_connection_url"
Merge "Small Refactors"