Fix Log4j version downgrade
Adding explicit log4j versions in the dependencyManagement section.
After downgrading to core-lib-azure:0.13.0-rc6 in !104 (merged), this step was missed. It reintroduced the old version of log4j.
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Adding explicit log4j versions in the dependencyManagement section.
After downgrading to core-lib-azure:0.13.0-rc6 in !104 (merged), this step was missed. It reintroduced the old version of log4j.