Fix project files in tests.

For #317.

Author: reznikmm

testsuite/ada_lsp/project_config/project_config_2.json

@@ -73,18 +73,17 @@
                     }
                 }
             },
-            "comment": "NOTE: we are loading an invalid project which has two files containing the same compilation unit: the behavior is undetermined.",
             "wait":[{
                 "id": "defname-1",
                 "result":{
-                    "uri": "$URI{second.ads}",
+                    "uri": "$URI{third.ads}",
                     "range": {
                         "start": {
-                            "line": 0,
+                            "line": 3,
                             "character": 10
                         },
                         "end": {
-                            "line": 0,
+                            "line": 3,
                             "character": 22
                         }
                     }

testsuite/ada_lsp/project_config/right_project.gpr

@@ -1,4 +1,6 @@
 project Right_Project is
+   for Excluded_Source_Files use ("third.ads");
+
    package Naming is
       for Spec ("To_Be_Called") use "second.ads";
    end Naming;

testsuite/ada_lsp/project_config/wrong_project.gpr

@@ -1,4 +1,6 @@
 project Wrong_Project is
+   for Excluded_Source_Files use ("second.ads");
+
    package Naming is
       for Spec ("To_Be_Called") use "third.ads";
    end Naming;