[errorprone] Suppress JavaLangClash to avoid breaking change

Renaming this class is a breaking change. Add a todo to rename it in
next major release.

See https://errorprone.info/bugpattern/JavaLangClash

Change-Id: I3528fd654e30d98f4ea43e71107d83324942141c

org.eclipse.jgit.lfs.server/src/org/eclipse/jgit/lfs/server/Response.java

@@ -27,6 +27,8 @@ class Action {
 		public Map<String, String> header;
 	}
 
+	// TODO(ms): rename this class in next major release
+	@SuppressWarnings("JavaLangClash")
 	/** Describes an error to be returned by the LFS batch API */
 	class Error {
 		public int code;

org.eclipse.jgit.lfs.server/src/org/eclipse/jgit/lfs/server/internal/LfsGson.java

@@ -30,6 +30,8 @@ public class LfsGson {
 	/**
 	 * Wrapper class only used for serialization of error messages.
 	 */
+	// TODO(ms): rename this class in next major release
+	@SuppressWarnings("JavaLangClash")
 	static class Error {
 		String message;
 

org.eclipse.jgit.lfs/src/org/eclipse/jgit/lfs/Protocol.java

@@ -87,6 +87,8 @@ class ExpiringAction extends Action {
 	}
 
 	/** Describes an error to be returned by the LFS batch API */
+	// TODO(ms): rename this class in next major release
+	@SuppressWarnings("JavaLangClash")
 	class Error {
 		public int code;
 

org.eclipse.jgit/src/org/eclipse/jgit/patch/PatchApplier.java

@@ -162,6 +162,8 @@ public static class Result {
 		 *
 		 * @since 6.6
 		 */
+		// TODO(ms): rename this class in next major release
+		@SuppressWarnings("JavaLangClash")
 		public static class Error {
 
 			private String msg;