Jira macro should honor all issues provided as a list of issues

One case for this need is the one described in issue JIRA-102.

Steps to reproduce:

• add a jira macro, with the source parameter set to list (or unset, as the default is list)
• put a list of issues in this jira macro (or a single issue)
• on jira instance side, change the access rights to some of the issues from the list for the service user, or delete some of the issues

Expected result:

• in the display of the jira macro, something should be displayed for each of the issues from the issues list - either its metadata and status, or a message that it cannot be found / cannot be accessed, depending on the case, maybe a link could be built for it automatically from the issue key and jira instance URL, etc.
• Note: there could be a parameter to control this behaviour, but the default of this parameter should be that by default the macro displays something for each issue provided explicitly

Actual result:

• for issues that are not accessible or don't exist, the macro displays nothing at all (empty result);
• a special case is the case when there is a single issue in the list, for which the macro could endup displaying nothing with no explanation.