Bug 1158821: 'time' command is not necessary in openshift.sh

## Don't install time package

Modify `install_broker_pkgs` not to install the time package.

With the previous commit, the time package is no longer needed.

## Put time command on LHS of pipeline

`configure_selinux_policy_on_broker`, `configure_selinux_policy_on_node`: When using the `time` command in a pipeline, use it on the left-hand side rather than on the right-hand side so that Bash's `time` builtin can be used rather than requiring the external time command provided by the time package.

This commit fixes bug 1158821.