Add aliases ApplicationName and applicationName for the processName connection property.

Two reasons:

1. JDBC defines the ApplicationName client info property (and the getClientInfo returning Properties object never returns anything [JDBC365] #407 change will fallback to CLIENT_PROCESS@SYSTEM, which contains the value of the processName connection property)
2. For similar purposes, ApplicationName is used by the PostgreSQL JDBC driver, and applicationName by the Microsoft SQL Server JDBC driver