Fixing wrong types in Seldon Core user methods #1144

[axsaucedo]

Fixes #1144

[axsaucedo]

/approve
/lgtm

[seldondev]

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[seldondev]

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[seldondev]

failed to trigger Pull Request pipeline

• failed to create agent
• failed to calculate in repo config
• failed to load trigger config for repository SeldonIO/seldon-core for ref e64090e
• failed to find any lighthouse configuration files in repo SeldonIO/seldon-core at sha e64090e
• failed to process repo SeldonIO/seldon-core refref e64090e
• failed to list files in directory /var/tmp/gitrepo660600678/.lighthouse
• open /var/tmp/gitrepo660600678/.lighthouse
• no such file or directory