imm-o-matic: Fix for newer pyyaml versions
https://github.com/yaml/pyyaml/issues/265 https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load(input)-Deprecation
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https://github.com/yaml/pyyaml/issues/265 https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load(input)-Deprecation