[vcs]: deprecate getRepositoryForFileQuick, add one missing usage

* use this deprecated method only as a deadlock quick fix solution;
* todo: if repository not found, but vcs vf root exists, add log.warn
 and start backgroundable repository creation process instead of using
 EDT; if mappings were changed and EDT started repository constructions
 -> we should manage this properly.

platform/dvcs-impl/src/com/intellij/dvcs/repo/AbstractRepositoryManager.java

@@ -57,8 +57,12 @@ public abstract class AbstractRepositoryManager<T extends Repository>
   public T getRepositoryForFile(@NotNull VirtualFile file) {
     return validateAndGetRepository(myGlobalRepositoryManager.getRepositoryForFile(file));
   }
-  
+
+  /**
+   * @Deprecated to delete in 2017.X
+   */
   @Nullable
+  @Deprecated
   public T getRepositoryForFileQuick(@NotNull VirtualFile file) {
     return validateAndGetRepository(myGlobalRepositoryManager.getRepositoryForFileQuick(file));
   }

platform/dvcs-impl/src/com/intellij/dvcs/repo/VcsRepositoryManager.java

@@ -94,7 +94,11 @@ public class VcsRepositoryManager extends AbstractProjectComponent implements Di
     return getRepositoryForFile(file, false);
   }
 
+  /**
+   * @Deprecated to delete in 2017.X
+   */
   @Nullable
+  @Deprecated
   public Repository getRepositoryForFileQuick(@NotNull VirtualFile file) {
     return getRepositoryForFile(file, true);
   }

plugins/github/src/org/jetbrains/plugins/github/util/GithubUtil.java

@@ -422,7 +422,7 @@ public class GithubUtil {
         return repository;
       }
     }
-    return manager.getRepositoryForFile(project.getBaseDir());
+    return manager.getRepositoryForFileQuick(project.getBaseDir());
   }
 
   public static boolean addGithubRemote(@NotNull Project project,