Add the location check back when loading bundles

[jdneo]

In #1253, I removed the location check when loading bundle, which means when loading bundles, if there is already a bundle with the same version installed/started, all the bundles with the same version will be ignored.

This is fine for the common users, but it may have some problems for the developers who develop Java LS extensions.

For example, when launching the extension in dev mode for the Java Debugger or Java Test Runner, since the bundles have no qualifier in version, so the developing bundles won't be loaded unless bump-up the version, or clean the LS cache, which is not convenient.

I think I should add the location check back.