[shopsys] made parameters overridable by ENV variables

[s3tezsky]

Q	A
Description, reason for the PR	We want to be able change parameters via ENV variables to easier change setting of application in any environment. This PR allows developers to override all parameters in parameters.yaml by ENV variables. This PR also unifies usage of parameters in different environment (dev, test, prod).
New feature	Yes
BC breaks	No
Fixes issues	...
Have you read and signed our License Agreement for contributions?	Yes

The original PR (#1615) was braking backward compatibility.

[grossmannmartin]

Hi, thanks for the change. I like the backward compatibility kept 👍

Can you please file an issue (or solve right now, if you feel like it) to address the application environment (DEV, TEST, PROD) and debug mode set with the environment variables? It was part of #1615 and I wouldn't want to forget about it.

[s3tezsky]

Can you please file an issue (or solve right now, if you feel like it) to address the application environment (DEV, TEST, PROD) and debug mode set with the environment variables? It was part of #1615 and I wouldn't want to forget about it.

At first I wanted to have it implemented here, then I thought about an effort and potantial risks so I have created an issue here #2065.

[henzigo]

Hello,
I just added some points from me, so please look at them.

[grossmannmartin]

Hey, I have one point from testing, can you please validate it?

To propagate the change of environment variables MAILER_DISABLE_DELIVERY, MAILER_DELIVERY_WHITELIST, MAILER_MASTER_EMAIL_ADDRESS I need to clean the cache

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

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