pylint fixing for {cvd,gcompute}_compute_client and device_driver.

Also fixed up the unittests to use mock.patch appropriately.

Bug: None
Test: pylint and run_tests.sh pass
Change-Id: I5aaf4e8a17bf354a4428e2517f496b63edb8ed6e
diff --git a/public/device_driver.py b/public/device_driver.py
index 810a3a8..31cbb12 100755
--- a/public/device_driver.py
+++ b/public/device_driver.py
@@ -62,6 +62,7 @@
 ADB_CONNECT_CMD = "adb connect 127.0.0.1:%(adb_port)d"
 
 
+# pylint: disable=invalid-name
 class AndroidVirtualDevicePool(object):
     """A class that manages a pool of devices."""
 
@@ -375,6 +376,7 @@
                       vnc_port)
 
 
+# pylint: disable=too-many-locals
 def CreateAndroidVirtualDevices(cfg,
                                 build_target=None,
                                 build_id=None,
@@ -631,7 +633,7 @@
     """
     credentials = auth.CreateCredentials(cfg, ALL_SCOPES)
     compute_client = android_compute_client.AndroidComputeClient(
-            cfg, credentials)
+        cfg, credentials)
     logger.info("Checking if user has access to project %s", cfg.project)
     if not compute_client.CheckAccess():
         logger.error("User does not have access to project %s", cfg.project)