azurerm_linux_web_app - fix runtime setting for java runtime

[xiaxyi]

The java runtime setting is quite flexible but the api doesn't have any restrictions to the user's input, which means, user can put whatever they want to the java runtime related properties.

We need to set a clear restrictions to these java related properties since service have a very strict reference to the property linuxFxVersion when setting up the app from the backend.

for exmaple:
"linuxFxVersion": "JBOSSEAP|7-java8" works while JBOSSEAP|7.0-java8 does not.

fix:#16200

fix:#17144

[katbyte]

Java tests are failing:

[xiaxyi]

Thanks @katbyte , updated test cases and slot settings

--- PASS: TestAccLinuxWebAppSlot_withJava11Tomcat85 (487.75s)
--- PASS: TestAccLinuxWebAppSlot_withJava11Tomcat8561 (599.95s)
--- PASS: TestAccLinuxWebAppSlot_withJava1109 (601.77s)
--- PASS: TestAccLinuxWebAppSlot_withJava8u242 (603.45s)
--- PASS: TestAccLinuxWebAppSlot_withJava11Tomcat9 (667.39s)
--- PASS: TestAccLinuxWebAppSlot_withJava8JBOSSEAP73 (550.27s)
PASS
ok      github.com/hashicorp/terraform-provider-azurerm/internal/services/appservice    550.963s

[peterprumbach-telekom]

Is this also gonna be implemented for other resources (e.g. azurerm_windows_web_app)?

[diogonborges]

@xiaxyi have you seen this request for changes?
EDIT, just saw that you did

@katbyte what is missing here so this can be merged and included in the next release?

[diogonborges]

LGTM

[jackofallops]

Closing as superseded by 19685

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