Description of problem:
hp-toolbox fails cannot find "pyqt5.cpython-35m-x86_64-linux-gnu.so"
file seems to be missing from "/usr/lib64/python3.5/site-packages/dbus/mainloop/"
adding the file manually fixes the problem. Not sure if this is a bug.

Version-Release number of selected component (if applicable):
hplip 15/16 any sub-version 

How reproducible:
Always

Steps to Reproduce:
1. Start hp-toolbox
2. read error message (see below


stat("/usr/lib64/python3.5/site-packages/dbus/mainloop/__init__.abi3.so", 0x7fff9b3377b0) = -1 ENOENT (No such file or directory)
stat("/usr/lib64/python3.5/site-packages/dbus/mainloop/__init__.so", 0x7fff9b3377b0) = -1 ENOENT (No such file or directory)
stat("/usr/lib64/python3.5/site-packages/dbus/mainloop/__init__.py", {st_mode=S_IFREG|0644, st_size=2336, ...}) = 0
stat("/usr/lib64/python3.5/site-packages/dbus/mainloop/__init__.py", {st_mode=S_IFREG|0644, st_size=2336, ...}) = 0
open("/usr/lib64/python3.5/site-packages/dbus/mainloop/__pycache__/__init__.cpython-35.pyc", O_RDONLY|O_CLOEXEC) = 6
fstat(6, {st_mode=S_IFREG|0644, st_size=527, ...}) = 0
lseek(6, 0, SEEK_CUR)                   = 0
fstat(6, {st_mode=S_IFREG|0644, st_size=527, ...}) = 0
read(6, "\26\r\r\n3\330\357W \t\0\0\343\0\0\0\0\0\0\0\0\0\0\0\0\7\0\0\0@\0\0"..., 528) = 527
read(6, "", 1)                          = 0
close(6)                                = 0
stat("/usr/lib64/python3.5/site-packages/dbus/mainloop", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/usr/lib64/python3.5/site-packages/dbus/mainloop", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
stat("/usr/lib64/python3.5/site-packages/dbus/mainloop", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
open("/usr/lib64/python3.5/site-packages/dbus/mainloop", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 6
fstat(6, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
getdents(6, /* 6 entries */, 32768)     = 208
getdents(6, /* 0 entries */, 32768)     = 0
close(6)                                = 0
write(2, "\33[31;01merror: Unable to load DB"..., 96error: Unable to load DBus libraries. Please check your installation and try agaiHP Linux Imaging and