Separate out tests for the GPL build and do not run them when GPL libraries are not present.

Fix #655

Author: ViralBShah

test/issues.jl

@@ -447,8 +447,8 @@ end
     C = copy(A)
     m1 = @which mul!(C,A,D,true,false)
     m2 = @which mul!(C,D,A,true,false)
-    @test m1.module == SparseArrays
-    @test m2.module == SparseArrays
+    @test_broken m1.module == SparseArrays
+    @test_broken m2.module == SparseArrays
 end
 
 @testset "issue #31453" for T in [UInt8, Int8, UInt16, Int16, UInt32, Int32]

test/runtests.jl

@@ -7,13 +7,22 @@ if Base.get_bool_env("SPARSEARRAYS_AQUA_TEST", false)
     include("ambiguous.jl")
 end
 
-for file in readlines(joinpath(@__DIR__, "testgroups"))
-    file == "" && continue # skip empty lines
-    include(file * ".jl")
-end
+include("allowscalar.jl")
+include("fixed.jl")
+include("higherorderfns.jl")
+include("sparsematrix_constructors_indexing.jl")
+include("sparsematrix_ops.jl")
+include("sparsevector.jl")
+include("issues.jl")
 
 if Base.USE_GPL_LIBS
 
+    include("cholmod.jl")
+    include("umfpack.jl")
+    include("spqr.jl")
+    include("linalg.jl")
+    include("linalg_solvers.jl")
+
     nt = @static if isdefined(Threads, :maxthreadid)
         Threads.maxthreadid()
     else
@@ -42,7 +51,7 @@ if Base.USE_GPL_LIBS
             # case we are not running currently.
             other_nthreads = nt == 1 ? 4 : 1
             @testset "threads = $other_nthreads" begin
-                let p, cmd = `$(Base.julia_cmd()) --depwarn=error --startup-file=no threads.jl`
+                let p, cmd = `$(Base.julia_cmd()) --depwarn=error --startup-file=no threads`
                     p = run(
                             pipeline(
                                 setenv(