INFRA-259 Upgrade JIRA to 7.3
Followup to INFRA-248: the upgrade JIRA 6.4 broke the Agile plugin and JIRA is randomly crashing every few nights, so let's upgrade to the latest version.
Followup to INFRA-248: the upgrade JIRA 6.4 broke the Agile plugin and JIRA is randomly crashing every few nights, so let's upgrade to the latest version.