JAVA_HOME property may point to Java 6 installation so we need to set it explicitly when starting Gradle. Running Gradle under Java 6 is deprecated and causes problems on some build agents.

renamed createMap() to create() to keep the old createMap() signature for some lugging plugins compatibility

IDEA-179374 "Deprecated API usage" doesn't suggest replacement when javatag @ling used together with @deprecated

- typo fixed

- javadoc typo fixed

- ServerType now may enforce only singleton deployment source types
- and thus may ban run-configs with choosable deployment sources

- ServerType may define singleton deployment source type's
- separate ConfigurationFactoryEx's will be used for them
- DeployToServerConfigurationType # getFactory -> getFactoryForType
- DeployToServerSettingsEditor split -> #AnySource and #LockedSource

- cleanup: old code simplified before refactoring

needed to test IDEA-176195 "Split current tag" exception in FreeMarker

replaced with "Conditional expression" inspection without highlighting (also fixes IDEA-179116)