[osci][upgrade] Fix dependencies in linux-firmware package

We advice our customers to run 6.1 master node update.
Unfortunately, update is not possible out of the box if fuel master was upgraded from 6.0 to 6.1 due to the following dependency conflict:
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[root@fuel ~]# yum update
<some skipped lines>
Running Transaction Test
Transaction Check Error:
  file /lib/firmware/ql2400_fw.bin from install of linux-firmware-20150115-45.git78535e88.mira2.noarch conflicts with file from package ql2400-firmware-20140317-35.gitdec41bce.mira1.noarch
  file /lib/firmware/ql2500_fw.bin from install of linux-firmware-20150115-45.git78535e88.mira2.noarch conflicts with file from package ql2500-firmware-20140317-35.gitdec41bce.mira1.noarch
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Workaround is to remove the following packages before running "yum update":
$ rpm -ev ql2400-firmware-20140317-35.gitdec41bce.mira1.noarch
$ rpm -ev ql2500-firmware-20140317-35.gitdec41bce.mira1.noarch