More code cleanup of ReplicationCliMain
Removed utility methods that are just forwarding to other utility methods.
Removed methods that have been ported to com.forgerock.opendj.cli.Utils.


ReplicationCliMain.java:
Replaced all protected / private.
Used static imports for utility methods.
Extracted methods addBaseDNs(), createTopologyCache().

ServerLoader.java:
Extracted methods isLdapEnabled(), isLdapsEnabled(), isStartTlsEnabled()

Installer.java:
Extracted method createInitialLdapContext().