Add reproducer for #10

There can be multiple entries with the same fileset name present in the fileset table.

development/mysql/03-issue-10.sql

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+-- Reproduction of https://github.com/vierbergenlars/bareos_exporter/issues/10
+
+INSERT INTO FileSet (fileset, md5, createtime, filesettext)
+    VALUES
+        ('FileSetX', 'd41d8cd98f00b204e9800998ecf8427e', NOW() - interval 14 day, ''),
+        ('FileSetX', 'd41d8cd98f00b204e9800998ecf8427f', NOW() - interval 7 day, '');
+
+INSERT INTO Job (job, name, type, level, jobstatus, schedtime, starttime, poolid)
+    VALUES
+        ('cx-fsx.1', 'cx-fsx', 'B', 'F', 'T', NOW() - interval 13 day, NOW() - interval 13 day, (select poolid from Pool WHERE name = 'Pool1')),
+        ('cx-fsx.2', 'cx-fsx', 'B', 'F', 'T', NOW() - interval 6 day, NOW() - interval 6 day, (select poolid from Pool WHERE name = 'Pool1'));
+
+UPDATE Job j SET
+    clientid = (SELECT c.clientid from Client c WHERE c.name = 'c1-fd'),
+    filesetid = (SELECT f.filesetid from FileSet f WHERE f.fileset = 'FileSetX' AND md5 = 'd41d8cd98f00b204e9800998ecf8427e'),
+    endtime = j.starttime + interval 1 hour
+    WHERE j.name = 'cx-fsx';
+
+UPDATE Job j SET
+    filesetid = (SELECT f.filesetid from FileSet f WHERE f.fileset = 'FileSetX' AND md5 = 'd41d8cd98f00b204e9800998ecf8427f')
+    WHERE j.job = 'cx-fsx.2';

development/postgres/03-issue-10.sql

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+-- Reproduction of https://github.com/vierbergenlars/bareos_exporter/issues/10
+
+INSERT INTO public.fileset (fileset, md5, createtime)
+    VALUES
+        ('FileSetX', 'd41d8cd98f00b204e9800998ecf8427e', NOW() - interval '2 weeks'),
+        ('FileSetX', 'd41d8cd98f00b204e9800998ecf8427f', NOW() - interval '1 week');
+
+INSERT INTO public.job (job, name, type, level, jobstatus, schedtime, starttime, poolid)
+    VALUES
+        ('cx-fsx.1', 'cx-fsx', 'B', 'F', 'T', NOW() - interval '1 week 6 days', NOW() - interval '1 week 6 days', (select poolid from pool WHERE name = 'Pool1')),
+        ('cx-fsx.2', 'cx-fsx', 'B', 'F', 'T', NOW() - interval '6 days', NOW() - interval '6 days', (select poolid from pool WHERE name = 'Pool1'));
+
+UPDATE public.job j SET
+    clientid = (SELECT c.clientid from public.client c WHERE c.name = 'c1-fd'),
+    filesetid = (SELECT f.filesetid from public.fileset f WHERE f.fileset = 'FileSetX' AND md5 = 'd41d8cd98f00b204e9800998ecf8427e'),
+    endtime = j.starttime + interval '1h'
+    WHERE j.name = 'cx-fsx';
+
+UPDATE public.job j SET
+    filesetid = (SELECT f.filesetid from public.fileset f WHERE f.fileset = 'FileSetX' AND md5 = 'd41d8cd98f00b204e9800998ecf8427f')
+    WHERE j.job = 'cx-fsx.2';