I've posted about this on the mythtv-users list but it also belongs here 
and probably on linux-media too.

[john@HP_Box ~]$ dmesg | grep adapter
[    1.845944] DVB: registering new adapter (Kworld UB499-2T T09(IT9137))
[john@HP_Box ~]$ dmesg | grep DVB
[    1.556887] saa7133[0]: subsystem: 0070:6700, board: Hauppauge 
WinTV-HVR1110 DVB-T/Hybrid [card=104,autodetected]
[    1.695217] tveeprom 0-0050: TV standards PAL(B/G) NTSC(M) PAL(I) 
SECAM(L/L') PAL(D/D1/K) ATSC/DVB Digital (eeprom 0xfc)
[    1.708443] DVB: Unable to find symbol tda10046_attach()
[    1.736049] usb 2-2: Product: DVB-T TV Stick
[    1.845944] DVB: registering new adapter (Kworld UB499-2T T09(IT9137))
[    1.848465] DVB: Unable to find symbol it913x_fe_attach()
[john@HP_Box ~]$ uname -r
3.10.0-123.13.1.el7.x86_64
[john@HP_Box ~]$

for comparison with this, which works:

[john@HP_Box ~]$ dmesg | grep "registering adapter"
[   14.345933] usb 2-2: DVB: registering adapter 0 frontend 0 (Kworld
UB499-2T T09(IT9137)_1)...
[   14.991941] usb 2-2: DVB: registering adapter 1 frontend 0 (Kworld
UB499-2T T09(IT9137)_2)...
[   20.597036] saa7134 0000:07:04.0: DVB: registering adapter 2 frontend
0 (Philips TDA10046H DVB-T)...
[john@HP_Box ~]$ uname -r
3.10.0-123.9.3.el7.x86_64
[john@HP_Box ~]$

3.18.0-1.el7.elrepo.x86_64 doesn't see the Hauppauge/Philips device at all.

John P