LPS-42667 Add BSH support
LPS-42677

According to this article:

https://www.liferay.com/it/web/raymond.auge/blog/-/blogs/liferay-6-2-targets-java-6-and-ant-1-8

Liferay 6.2 should requires Ant 1.8 or higher.
LPS-42671 When building shared libs the ${import.shared} property has bad value
LPS-42670 This should ber less disruptive, and achieves the same thing without requiring each plugin to specify that it's a "jar" ?
LPS-42690