method overloading for putInstructionFile to be able to handle the custom instruction file suffix if specified

Author: Anirav Kareddy

src/main/java/software/amazon/encryption/s3/internal/InstructionFileConfig.java

@@ -49,6 +49,10 @@ boolean isInstructionFilePutEnabled() {
     }
 
     PutObjectResponse putInstructionFile(PutObjectRequest request, String instructionFileContent) {
+       return putInstructionFile(request, instructionFileContent, INSTRUCTION_FILE_SUFFIX);
+    }
+
+    PutObjectResponse putInstructionFile(PutObjectRequest request, String instructionFileContent, String instructionFileSuffix) {
         // This shouldn't happen in practice because the metadata strategy will evaluate
         // if instruction file Puts are enabled before calling this method; check again anyway for robustness
         if (!_enableInstructionFilePut) {
@@ -60,12 +64,11 @@ PutObjectResponse putInstructionFile(PutObjectRequest request, String instructio
         // It contains a key with no value identifying it as an instruction file
         instFileMetadata.put(INSTRUCTION_FILE, "");
 
-        // In a future release, non-default suffixes will be supported.
         // Use toBuilder to keep all other fields the same as the actual request
         final PutObjectRequest instPutRequest = request.toBuilder()
-                .key(request.key() + INSTRUCTION_FILE_SUFFIX)
-                .metadata(instFileMetadata)
-                .build();
+          .key(request.key() + instructionFileSuffix)
+          .metadata(instFileMetadata)
+          .build();
         switch (_clientType) {
             case SYNCHRONOUS:
                 return _s3Client.putObject(instPutRequest, RequestBody.fromString(instructionFileContent));