disable discovery cache
disable discovery cache

Disable discovery cache as it broke CSV commands on windows with lock
errors. The cache is new in googleapiclient 1.4.2 which was upgraded
after GAM 3.61:

https://github.com/google/google-api-python-client/commit/30125120b48860d00ba4e96d56a86d9d02a90960

down the line, we should investigate actual issue with cache as enabling
it would improve GAM performance.

GAM-team/GAM,GAM-team/GAM