Rename the test files (#113)

Author: rossviljoen

test/laplace.jl renamed to test/LaplaceApproximationModule.jl

@@ -54,11 +54,11 @@ include("test_utils.jl")
     println(" ")
     @info "Ran expected_loglik tests"
 
-    include("sparse_variational.jl")
+    include("SparseVariationalApproximationModule.jl")
     println(" ")
-    @info "Ran svgp tests"
+    @info "Ran sva tests"
 
-    include("laplace.jl")
+    include("LaplaceApproximationModule.jl")
     println(" ")
     @info "Ran laplace tests"
 end