Squashed 'external/workload-automation/' changes from 83da20ce..37f4d330

37f4d330 WA/Jankbench: Update Pandas function to remove deprecated .ix access
8c7320a1 workloads/gfxbench: Swtich to the home screen before run
6d72a242 doc: fix callback priority table
0c2613c6 fw/execution: Fix missing parameter
b8301640 docs/dev_ref: Fix incorrect attribute name
c473cfa8 docs/user_information: Fix references to Python 2.7
1f0da5fa Dockerfile: Update to store environment variables in separate file
39121caf workloads/gfxbench: Fix using the correct scrollable element.

git-subtree-dir: external/workload-automation
git-subtree-split: 37f4d330156a048e682913025c44e84dfa1d3149