jira.path.attachments should be removed from propertyentry table

Migrating/upgrading JIRA from one server to another may cause conflicting attachment paths between the jira.path.attachments from the application propertyentry table and the default attachment file path.

This can cause confusion especially if the JIRA instance is moved between two different operating systems.

For example:

___ Application Properties _________________
    jira.path.attachments                         : E:\Program Files   (x86)\Atlassian\Application Data\JIRA\data\attachments

___ File Paths _____________________________

     JIRA Home                                     : /opt/app/JIRA/Data
     Location of atlassian-jira.log                : /opt/app/JIRA/Data/log/atlassian-jira.log
     Index Path                                    : /opt/app/JIRA/Data/caches/indexes
     Attachment Path                               : /opt/app/JIRA/Data/data/attachments

It is understood that this "jira.path.attachment" property is not used once the new default "Attachment Path" gets used from that point in. We would recommend possibly removing this old entry entirely from the database once the change to default occurs as to not confuse customers when looking through the logs.