Remove username from SSH URL in tests

For the tests were we test prompting for the username we should make
sure not to include the username in the URL or as the username_ptr as
this will provide a default value. Will only be a problem for us when
prompting for a username is the default setting.

Author: omus

test/libgit2.jl

@@ -1644,10 +1644,11 @@ mktempdir() do dir
             end
 
             # SSH requires username
+            url_no_username = "github.com:test/package.jl"
             ssh_u_ex = quote
                 include($LIBGIT2_HELPER_PATH)
                 valid_cred = SSHCredentials($username, "", $valid_key, $(valid_key * ".pub"))
-                credential_loop(valid_cred, $url)
+                credential_loop(valid_cred, $url_no_username)
             end
 
             # Note: We cannot use the default ~/.ssh/id_rsa for tests since we cannot be
@@ -1748,7 +1749,7 @@ mktempdir() do dir
                 ssh_user_empty_ex = quote
                     include($LIBGIT2_HELPER_PATH)
                     valid_cred = LibGit2.SSHCredentials($username, "", $valid_key, $(valid_key * ".pub"))
-                    credential_loop(valid_cred, $url, "")
+                    credential_loop(valid_cred, $url_no_username, "")
                 end
 
                 challenges = [