Fix javadoc compilation errors

The command ant javadoc currently produces the following compilation error:

[javadoc] Constructing Javadoc information...
[javadoc] /Users/mikek/Documents/workspace/ejbca_alpha/modules/peerconnector/src-ejb/org/ejbca/peerconnector/PeerSenderSessionBean.java:27: error: cannot find symbol
[javadoc] import org.ejbca.peerconnector.ra.PeerRaSlaveBroadcastHelper;
[javadoc] ^
[javadoc] symbol: class PeerRaSlaveBroadcastHelper
[javadoc] location: package org.ejbca.peerconnector.ra
[javadoc] /Users/mikek/Documents/workspace/ejbca_alpha/modules/peerconnector/src-ejb/org/ejbca/peerconnector/PeerSenderSessionBean.java:28: error: cannot find symbol
[javadoc] import org.ejbca.peerconnector.ra.PeerRaSlaveBroadcastType;
[javadoc] ^
[javadoc] symbol: class PeerRaSlaveBroadcastType
[javadoc] location: package org.ejbca.peerconnector.ra
[javadoc] /Users/mikek/Documents/workspace/ejbca_alpha/modules/peerconnector/src-ejb/org/ejbca/peerconnector/ra/PeerRaMasterServiceBean.java:91: error: cannot find symbol
[javadoc] private final ConcurrentHashMap<PeerOutgoingInformation, List<PeerRaConnection>> mapOfPeerRas = new ConcurrentHashMap<>();
[javadoc] ^
[javadoc] symbol: class PeerRaConnection
[javadoc] location: class PeerRaMasterServiceBean
[javadoc] /Users/mikek/Documents/workspace/ejbca_alpha/modules/peerconnector/src-ejb/org/ejbca/peerconnector/ra/PeerRaMasterServiceBean.java:252: error: cannot find symbol
[javadoc] private void addRaConnection(final int missingConnections, final List<PeerRaConnection> listOfRaConnections, final PeerOutgoingInformation peerOutgoingInformation) throws InterruptedException {
[javadoc] ^
[javadoc] symbol: class PeerRaConnection
[javadoc] location: class PeerRaMasterServiceBean
[javadoc] /Users/mikek/Documents/workspace/ejbca_alpha/modules/peerconnector/src-ejb/org/ejbca/peerconnector/ra/PeerRaMasterServiceThreadBean.java:51: error: cannot find symbol
[javadoc] public Future<Void> keepServingRaPeer(final RaMasterApi raMasterApiProxy, final RaMasterApi raMasterApiLocal, final PeerRaConnection peerRaConnection, final PeerOutgoingInformation peerOutgoingInformation,
[javadoc] ^
[javadoc] symbol: class PeerRaConnection
[javadoc] location: class PeerRaMasterServiceThreadBean
[javadoc] /Users/mikek/Documents/workspace/ejbca_alpha/modules/cesecore-common/src/org/cesecore/certificates/util/AlgorithmTools.java:75: warning - Tag @see: can't find getSignatureAlgorithm in org.cesecore.util.CertTools
[javadoc] Standard Doclet version 1.7.0-u60-unofficial
[javadoc] Building tree for all the packages and classes...