wiki

Red Hat Enterprise Linux 6.7 Supplement for HP Service Pack for ProLiant 2015.06.0 Release Notes
https://ftp.hp.com/pub/softlib2/software1/doc/p465640610/v112077/RHEL6.7Supplement-SPP2015.06.0ReleaseNotes.pdf

You can use the ISO file

http://h20564.www2.hpe.com/hpsc/swd/public/detail?swItemId=MTX_e162323521334aa785ad840258#tab1

or repository for Redhat and Suse

http://downloads.linux.hp.com/SDR/project/spp/
http://downloads.linux.hp.com/SDR/keys.html

Add for Redhat in /etc/repo.d/hp_spp.repo

[spp]
name=Service Pack for ProLiant
baseurl=http://downloads.linux.hpe.com/repo/spp/rhel/6.7/x86_64/current/
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/GPG-KEY-ServicePackforProLiant

And:

# rpm --import http://downloads.linux.hp.com/SDR/hpPublicKey1024.pub
# rpm --import http://downloads.linux.hp.com/SDR/hpPublicKey2048.pub
# rpm --import http://downloads.linux.hp.com/SDR/hpPublicKey2048_key1.pub