Added system property "liquibase.env" to support multiple instances
running on a single host, keeping a separation of instances by including
an environment name. The LOCKEDBY column when the system property is set
will include the liquibase.env value, separated by a #. e.g.
localhost#server1 (127.0.0.1)
Merge pull request #1 from mrswadge/3.2.0.b01

Added system property "liquibase.env" to support multiple instances running on a single host, keeping a separation of instances by including
an environment name. The LOCKEDBY column when the system property is set
will include the liquibase.env value, separated by a #. e.g.
localhost#server1 (127.0.0.1)