Validate model names

[YevheniiSemendiak]

They should not contain underscores (_), otherwise we are getting

2021-10-13 07:44:40 - root - INFO - Deploying model: _DeployedModel(image='registry.default.org.neu.ro/yevheniisemendiak/ml_recipe_bone_age/inference:21.4.13', model_name='bone_age_predictor', model_storage_uri=URL('storage://default/yevheniisemendiak/ml_recipe_bone_age/mlruns/0/26e39c613b48477d8a2511748c9efecc/artifacts/model'), model_stage='Staging', model_version='1', source_run_id='26e39c613b48477d8a2511748c9efecc', deployment_namespace='seldon', need_redeploy=True)
The SeldonDeployment "bone_age_predictor-staging" is invalid: metadata.name: Invalid value: "bone_age_predictor-staging": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')
2021-10-13 07:44:45 - root - ERROR - Unable to deploy '_DeployedModel(image='registry.default.org.neu.ro/yevheniisemendiak/ml_recipe_bone_age/inference:21.4.13', model_name='bone_age_predictor', model_storage_uri=URL('storage://default/yevheniisemendiak/ml_recipe_bone_age/mlruns/0/26e39c613b48477d8a2511748c9efecc/artifacts/model'), model_stage='Staging', model_version='1', source_run_id='26e39c613b48477d8a2511748c9efecc', deployment_namespace='seldon', need_redeploy=True)': Command 'kubectl apply -f /tmp/tmpx8e7hxlf' returned non-zero exit status 1.
2021-10-13 07:44:45 - root - INFO - Deployed models: bone_age_predictor-staging:1