There are two issues related to RPM installs that are currently broken:
1. zabbix-release RPM is missing to provide easy way to install Zabbix 3 installs for CENTOS or RHEL.
2. The yum repo at http://repo.zabbix.com/zabbix/2.5/rhel/7/x86_64/
has the current RPMs, but the repodata is out of date, yum installs only find old RPMS.

The fixes should pretty quick and will also CENTOS, RHEL users to install/test quickly. The BETA1 rpms install cleanly on CentOS 7.

[vagrant@chat ~]$ sudo repoquery -qa --repoid=zabbix
zabbix-agent-0:3.0.0-0.beta1.el7.x86_64
zabbix-get-0:3.0.0-0.beta1.el7.x86_64
zabbix-java-gateway-0:3.0.0-0.beta1.el7.x86_64
zabbix-proxy-mysql-0:3.0.0-0.beta1.el7.x86_64
zabbix-proxy-pgsql-0:3.0.0-0.beta1.el7.x86_64
zabbix-proxy-sqlite3-0:3.0.0-0.beta1.el7.x86_64
zabbix-sender-0:3.0.0-0.beta1.el7.x86_64
zabbix-server-mysql-0:3.0.0-0.beta1.el7.x86_64
zabbix-server-pgsql-0:3.0.0-0.beta1.el7.x86_64
zabbix-web-0:3.0.0-0.beta1.el7.noarch
zabbix-web-japanese-0:3.0.0-0.beta1.el7.noarch
zabbix-web-mysql-0:3.0.0-0.beta1.el7.noarch
zabbix-web-pgsql-0:3.0.0-0.beta1.el7.noarch