Update wifi enterprise test scripts for new wifi test setup.

Apply pep8 style.
Use asserts properly.
Update string format convention.
Clean up import statements and namespace.
Update attenuator usage for new Wi-Fi test setup.

Also fix a syntax issue in scanner test.

Bug=29182983

Change-Id: Iedfaa1ffe4e72f5b2a356d5b25c2a681344c81c8
3 files changed
tree: 285be9d009bde4d5ff3f06316a2c1dbfd0ed6d06
  1. acts/