doc/examples/flatpak-autotools Unhandled exception

Summary

When attempting to build the flatpak-autotools example buildstream exits due to an unhandled exception.

Steps to reproduce

git clone git@gitlab.com:BuildStream/buildstream.git
cd buildstream/doc/examples/flatpak-autotools/
bst build hello.bst

What is the current bug behavior?

When resolving cached state an unhandled attribute error occurs. AttributeError: 'Repo' object has no attribute 'reload_config'

What is the expected correct behavior?

The build should pass.

Relevant logs and/or screenshots

paste

Possible fixes

Unknown

Other relevant information

• BuildStream version affected: /milestone %BuildStream_v1.1.4 (Commit 3814905a)

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