There is a dependency check failing during installation of the agent on a rocks/centos 6.5 cluster.  As far as I can tell the cyrus-sasl-gssapi routine is actually located in the cyrus-sasl-lib, not as a separate entity.  Here is the detail log:

BEGIN sudo yum info cloudera-manager-agent
Available Packages
Name : cloudera-manager-agent
Arch : x86_64
Version : 5.0.0
Release : 1.cm500.p0.215.el6
Size : 3.7 M
Repo : cloudera-manager
Summary : The Cloudera Manager Agent
URL : http://www.cloudera.com
License : Proprietary
Description : The Cloudera Manager Agent.
:
: The Agent is deployed to machines running services managed by
: Cloudera Manager.

END (0)
Version : 5.0.0
Release : 1.cm500.p0.215.el6
BEGIN sudo yum -y install cloudera-manager-agent
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package cloudera-manager-agent.x86_64 0:5.0.0-1.cm500.p0.215.el6 will be installed
--> Processing Dependency: fuse for package: cloudera-manager-agent-5.0.0-1.cm500.p0.215.el6.x86_64
--> Processing Dependency: fuse-libs for package: cloudera-manager-agent-5.0.0-1.cm500.p0.215.el6.x86_64
--> Processing Dependency: libxslt for package: cloudera-manager-agent-5.0.0-1.cm500.p0.215.el6.x86_64
--> Processing Dependency: cyrus-sasl-gssapi for package: cloudera-manager-agent-5.0.0-1.cm500.p0.215.el6.x86_64
--> Running transaction check
---> Package cloudera-manager-agent.x86_64 0:5.0.0-1.cm500.p0.215.el6 will be installed
--> Processing Dependency: cyrus-sasl-gssapi for package: cloudera-manager-agent-5.0.0-1.cm500.p0.215.el6.x86_64
---> Package fuse.x86_64 0:2.8.3-4.el6 will be installed
---> Package fuse-libs.x86_64 0:2.8.3-4.el6 will be installed
---> Package libxslt.x86_64 0:1.1.26-2.el6_3.1 will be installed
--> Finished Dependency Resolution
Error: Package: cloudera-manager-agent-5.0.0-1.cm500.p0.215.el6.x86_64 (cloudera-manager)
Requires: cyrus-sasl-gssapi
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest

Tom