Description of problem:
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gdeploy should provide the option to abort the installation when the particular section fails.

What happens with HCI installation, if something fails, gdeploy doesn't exit there, but continues to the next step, which lead to total misconfiguration.

Take for example, if the creation of vg fails, then there is no point in creation of lv1 ( thick-pool ), lv2 ( thin-pool ), lv3 ( thin lv), lv4 (thin-lv )

Version-Release number of selected component (if applicable):
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gdeploy-2.0-16

How reproducible:
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Always

Steps to Reproduce:
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NA

Actual results:
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gdeploy configuration doesn't stop on failure

Expected results:
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Provide an option in each of the section - 'abort_on_failure=<val>' - where val can be 0 or 1.

Additional info:
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Based on the requirement the user can opt to abort the gdeploy configuration/installation to abort on failure, or to proceed if required.