fixup! Use LibSSH.jl to set up an SSH server for the SSHManager tests

Author: JamesWrigley

test/distributed_exec.jl

@@ -830,10 +830,12 @@ if Sys.isunix() # aka have ssh
         print("\nssh addprocs with tunnel (SSH multiplexing)\n")
         new_pids = addprocs_with_testenv([("localhost", num_workers)]; tunnel=true, multiplex=true, sshflags=sshflags)
         @test length(new_pids) == num_workers
-        controlpath = joinpath(homedir(), ".ssh", "julia-$(ENV["USER"])@localhost:2222")
-        @test issocket(controlpath)
-        test_n_remove_pids(new_pids)
-        @test :ok == timedwait(()->!issocket(controlpath), 10.0; pollint=0.5)
+        mktempdir() do path
+            controlpath = joinpath(path, "julia-$(ENV["USER"])@localhost:2222")
+            @test issocket(controlpath)
+            test_n_remove_pids(new_pids)
+            @test :ok == timedwait(()->!issocket(controlpath), 10.0; pollint=0.5)
+        end
 
         print("\nAll supported formats for hostname\n")
         h1 = "localhost"