munin: fix missing Date::Parse module error & make test fail w/o a fix

Upstream change: https://github.com/munin-monitoring/munin/pull/1502

nixos/tests/munin.nix

@@ -37,8 +37,10 @@ import ./make-test-python.nix ({ pkgs, ...} : {
     with subtest("ensure munin-node starts and listens on 4949"):
         one.wait_for_unit("munin-node.service")
         one.wait_for_open_port(4949)
+
     with subtest("ensure munin-cron output is correct"):
         one.wait_for_file("/var/lib/munin/one/one-uptime-uptime-g.rrd")
         one.wait_for_file("/var/www/munin/one/index.html")
+        one.wait_for_file("/var/www/munin/one/one/diskstat_iops_vda-day.png", timeout=60)
   '';
 })

pkgs/servers/monitoring/munin/default.nix

@@ -33,7 +33,7 @@ stdenv.mkDerivation rec {
     perlPackages.Socket6
     perlPackages.URI
     perlPackages.DBFile
-    perlPackages.DateManip
+    perlPackages.TimeDate
     perlPackages.FileCopyRecursive
     perlPackages.FCGI
     perlPackages.NetSNMP
@@ -126,7 +126,7 @@ stdenv.mkDerivation rec {
         esac
         wrapProgram "$file" \
           --set PERL5LIB "$out/${perlPackages.perl.libPrefix}:${with perlPackages; makePerlPath [
-                LogLog4perl IOSocketINET6 Socket6 URI DBFile DateManip
+                LogLog4perl IOSocketINET6 Socket6 URI DBFile TimeDate
                 HTMLTemplate FileCopyRecursive FCGI NetCIDR NetSNMP NetServer
                 ListMoreUtils DBDPg LWP rrdtool
                 ]}"