Demote HsImport func-tests to unit-test

Previously, we had long running func-tests for HsImport.
However, after the first code-action tests, we actually are
testing the same functionality over and over again.
Moreover, we dont have to test that HsImport works as intended
since they have a huge set of tests, anyways.

Now, we only test that our implementation of the plugin
truly maps correctly to HsImport, accelerating execution time
of func-tests as a side-effect. Hooray!

Author: fendor

haskell-ide-engine.cabal

@@ -200,6 +200,7 @@ test-suite unit-test
                        GhcModPluginSpec
                        -- HaRePluginSpec
                        HooglePluginSpec
+                       HsImportSpec
                        JsonSpec
                        LiquidSpec
                        PackagePluginSpec
@@ -208,7 +209,7 @@ test-suite unit-test
   build-tool-depends:  cabal-helper:cabal-helper-main, hspec-discover:hspec-discover
   build-depends:       QuickCheck
                      , aeson
-                     , cabal-helper 
+                     , cabal-helper
                      , ghc
                      , base
                      , bytestring