Avoid setting the isolation level to the same value in C3P0ConnectionProvider

Description

As explained in this forum thread, we should avoid setting the isolation level over and over to the same value if the isolation level is already set to that particular value.

Environment

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Status

Assignee

Vlad Mihalcea

Reporter

Vlad Mihalcea

Fix versions

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backPortable

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Suitable for new contributors

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Pull Request

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Affects versions

Priority

Minor
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