Add shu to test peer code paths in ra_SUITE and ra_system_SUITE

When starting remote peer nodes in tests, shu must be included in the
code path alongside other ra dependencies. Without this, distributed
tests fail with 'shu.app not found' errors.

Made-with: Cursor

Author: kjnilsson

test/ra_SUITE.erl

@@ -1625,7 +1625,7 @@ start_remote_cluster(Num, PrivDir, ClusterName, Machine) ->
 start_peer(Name, PrivDir) ->
     Dir = "'" ++ filename:join(PrivDir, Name) ++ "'",
     Pa = [filename:dirname(code:which(App))
-          || App <- [aten, gen_batch_server, seshat, ra]],
+          || App <- [aten, gen_batch_server, seshat, shu, ra]],
     ct:pal("starting peer node ~ts for node ~ts with -pa ~ts and data_dir ~ts",
            [Name, node(), Pa, Dir]),
     {ok, _P, S} = ?CT_PEER(#{name => Name, args => ["-pa"] ++ Pa ++ ["-ra", "data_dir", Dir]}),

test/ra_system_SUITE.erl

@@ -223,7 +223,7 @@ start_peer(PrivDir) ->
     Dir0 = filename:join(PrivDir, Name),
     Dir = "'" ++ Dir0 ++ "'",
     Pa = [filename:dirname(code:which(App))
-          || App <- [aten, gen_batch_server, seshat, ra]],
+          || App <- [aten, gen_batch_server, seshat, shu, ra]],
     Args = ["-pa"] ++ Pa ++ ["-ra", "data_dir", Dir],
     ct:pal("starting child node ~ts for node ~ts~n", [Name, Args]),
     {ok, P, S} = ?CT_PEER(#{name => Name, args => Args}),