Fixed pip with http(s)_proxy

pip failed to insall packages with the http_proxy and https_proxy localrc
environment variables. indeed, the case of the variables was uppercase
and these variables are normally lowercase.

Change-Id: I73054aafd353ccf53986f0ec05426f6a2c4e2240
Closes-Bug: 1307492
Merge "Fixed pip with http(s)_proxy"