[GSS](6.4.z) Exisiting deployments from 6.4.2 are always deactivated after server restart in 6.4.6+

1. Installed BPM Suite 6.4.2;
2. Created a simple project;
3. Upgraded to BPM Suite 6.4.7 (also updated database schema);
4. Once started, the project created in 6.4.2 is deactivated even database showing it is active;

• DeploymentUnit is stored in database and is active even after server restart;
• Once activated, project works well in bc. However, it is deactivated again after server restart;
• Applying latest Update available does not fix the issue.