Modified the names of all the getter functions to be lowercase

Author: Anirav Kareddy

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

@@ -27,21 +27,21 @@ public ReEncryptInstructionFileResponse(String bucket, String key, String instru
   /**
    * @return the S3 bucket containing the re-encrypted instruction file
    */
-  public String Bucket() {
+  public String bucket() {
     return bucket;
   }
 
   /**
    * @return the S3 object key of the encrypted object in S3
    */
-  public String Key() {
+  public String key() {
     return key;
   }
 
   /**
    * @return the instruction file suffix used for the instruction file
    */
-  public String InstructionFileSuffix() {
+  public String instructionFileSuffix() {
     return instructionFileSuffix;
   }
 }