pulseaudio fails to load modules

Pulseaudio 1:7.1-1ubuntu1 in xenial is unable to load some of its modules, more importantly at least the bluez module and the cli module:

Nov 13 10:14:15 demeter pulseaudio[3467]: [pulseaudio] ltdl-bind-now.c: Impossible d'ouvrir le module module-bluez5-device.so : module-bluez5-device.so: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type
Nov 13 10:14:15 demeter pulseaudio[3467]: [pulseaudio] module.c: Failed to open module "module-bluez5-device".
Nov 13 10:14:15 demeter pulseaudio[3467]: [pulseaudio] module-bluez5-discover.c: Failed to load module for device /org/bluez/hci0/dev_30_22_04_06_16_46
Nov 13 10:16:10 demeter pulseaudio[3467]: [pulseaudio] ltdl-bind-now.c: Impossible d'ouvrir le module module-cli-protocol-unix.so : module-cli-protocol-unix.so: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type
Nov 13 10:16:10 demeter pulseaudio[3467]: [pulseaudio] module.c: Failed to open module "module-cli-protocol-unix".
Nov 13 10:16:11 demeter pulseaudio[3467]: [pulseaudio] ltdl-bind-now.c: Impossible d'ouvrir le module module-cli-protocol-unix.so : module-cli-protocol-unix.so: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type

Using the version of pulseaudio from wily; things appear to work as expected.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: pulseaudio 1:6.0-0ubuntu13
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.2-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: mtrudel 12148 F.... pulseaudio
 /dev/snd/pcmC0D0p: mtrudel 12148 F...m pulseaudio
 /dev/snd/controlC0: mtrudel 12148 F.... pulseaudio
 /dev/snd/controlC1: mtrudel 12148 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Nov 13 11:17:34 2015
InstallationDate: Installed on 2015-03-30 (228 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/03/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0603
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8Z68-M PRO
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0603:bd11/03/2011:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8Z68-MPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer