removed setting the secureRandom attribute in the builder for AES + RSA keyrings in all of the test cases

Author: Anirav Kareddy

src/test/java/software/amazon/encryption/s3/S3EncryptionClientMatDescTest.java

@@ -53,7 +53,7 @@ public static void setUp() throws NoSuchAlgorithmException {
   public void testAesMaterialsDescriptionInObjectMetadata() {
     AesKeyring aesKeyring = AesKeyring.builder()
       .wrappingKey(AES_KEY)
-      .secureRandom(new SecureRandom())
+      
       .materialsDescription(MaterialsDescription.builder()
         .put("version", "1.0")
         .build())
@@ -123,7 +123,7 @@ public void testRsaMaterialsDescriptionInObjectMetadata() {
   public void testAesMaterialsDescriptionInInstructionFile() {
     AesKeyring aesKeyring = AesKeyring.builder()
       .wrappingKey(AES_KEY)
-      .secureRandom(new SecureRandom())
+      
       .materialsDescription(MaterialsDescription.builder()
         .put("version", "1.0")
         .build())
@@ -227,7 +227,7 @@ public void testRsaMaterialsDescriptionInInstructionFile() {
   public void testAesKeyringMatDescOverridesPutObjectEncryptionContext() {
     AesKeyring aesKeyring = AesKeyring.builder()
       .wrappingKey(AES_KEY)
-      .secureRandom(new SecureRandom())
+      
       .materialsDescription(MaterialsDescription.builder()
         .put("version", "1.0")
         .build())