changed OpenNMS dependencies to 14.0.0. Part of it was to change the xsds artefact from opennms-import to opennms-provisioning-persistens
created AssetField_1_12 enum class for old systems. updated AssedField enum for OpenNMS 14
Merge pull request #6 from OpenNMS/feature/PRIS-104

Feature/pris 104
added scriptstep that changes assets from OpenNMS 14 mode to 1.12 mode.
Merge pull request #7 from OpenNMS/feature/PRIS-103

Feature/PRIS-103 OpenNMS 14 changes