Increase timeout/attempts for keycloak check

[viniciusdc]

Fixes #1022

Increasing the number of attempts and timeout for checking if the keycloak server is in a running state might solve the flacky tests.

Changes:

• Increase number of attempts and timeout condition for requesting access to keycloak admin URI

Types of changes

What types of changes does your code introduce?

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds a feature)
• Breaking change (fix or feature that would cause existing features to not work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Other (please describe):

Testing

Requires testing

• Yes
• No