jira-integration: Add predefined WorkReportType for JIRA connector

* The predefined type will have a line description value to store comments in
  each line.
* As for the case of personal timesheets the new type will be hidden for the
  users in the list of timesheets templates.

FEA: ItEr77S16JiraAndTimConnectorContributionIntegration
jira-integration: Use new predefined work report type in JiraTimesheetSynchronizer

FEA: ItEr77S16JiraAndTimConnectorContributionIntegration
jira-integration: Move code part from updateWorkReportLine to updateOrCreateWorkReportLineAndAddToWorkReport

The code was being generated in 2 parts, first for the query and then to be set.
As in other cases if the WorkReportLine is found by code, we don't need to set
it again. So the part related to manage the code has been moved close to the
query and only set for newly created objects.

FEA: ItEr77S16JiraAndTimConnectorContributionIntegration
jira-integration: Simplify code in updateOrCreateDescriptionValuesAndAddToWorkReportLine

As we know that the predefined WorkReportType will only have 1 DescriptionValue,
we can take advantage of this to simplify the code.

FEA: ItEr77S16JiraAndTimConnectorContributionIntegration