<openshift.ks> bz1140782 - improve replicaset config

configure_datastore_add_replicants fixes

Fix some logic and typos in configure_datastore_add_replicants.
Merge pull request #467 from detiber/bz1140782

<openshift.ks> bz1140782 - improve replicaset config
install: mod-rewrite frontend deprecation notice

Since 2.2 will deprecate the use of mod-rewrite, inserting a small
notice under 2.1 openshift.{sh,ks} parameter.
Merge pull request #473 from sosiouxme/2.1-deprecate-mode-rewrite

install: mod-rewrite frontend deprecation notice
openshift.ks, install_broker_pkgs: Make pkgs local

Declare the pkgs variable in install_broker_pkgs as local.
openshift.ks: Install policycoreutils-python

install_broker_pkgs: Install policycoreutils-python so that the semanage
command will be available for use in configure_selinux_policy_on_broker.
openshift.ks: Install time package on broker

install_broker_pkgs: Install the time package so that the external time
command will be available for use in configure_selinux_policy_on_broker.

Because we use the time command in the right-hand side of a pipeline, we
must have the external command available rather than relying on Bash's
builtin time command; Bash does not allow builtins to be used on the
right-hand side of a pipeline.

This commit fixes bug 1158684.