After upgrading Red Hat Satellite from 6.2.14 to 6.3, Unable to provision new host using custom template

Solution Verified - Updated 2019-08-21T08:26:14+00:00 -

Issue

Provisioning new host using custom template after upgrading Red Hat Satellite from 6.2.14 to 6.3 fails with below error.
```
Failure parsing Custom_kickstart_template: Safemode doesn't allow to access 'block_pass' on &:present?.
```

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