Speed up slow tests by reducing RSA modulus size (from 2048 --> 512).

LayoutTests/crypto/rsa-oaep-key-manipulation-expected.txt

Index: LayoutTests/crypto/rsa-oaep-key-manipulation-expected.txt
diff --git a/LayoutTests/crypto/rsa-oaep-key-manipulation-expected.txt b/LayoutTests/crypto/rsa-oaep-key-manipulation-expected.txt
index 5c769a0cdbdb155ab62371d287315f6092c911e6..06038d5ccbe6656c357bbef94ed52c20f815e9d4 100644
--- a/LayoutTests/crypto/rsa-oaep-key-manipulation-expected.txt
+++ b/LayoutTests/crypto/rsa-oaep-key-manipulation-expected.txt
@@ -7,13 +7,13 @@ Generating a key pair...
 PASS keyPair.toString() is '[object KeyPair]'
 PASS keyPair.publicKey.type is 'public'
 PASS keyPair.publicKey.algorithm.name is 'RSA-OAEP'
-PASS keyPair.publicKey.algorithm.modulusLength is 2048
+PASS keyPair.publicKey.algorithm.modulusLength is 512
 PASS keyPair.publicKey.usages is ["encrypt", "wrapKey"]
 PASS bytesToHexString(keyPair.publicKey.algorithm.publicExponent) is '010001'
 PASS keyPair.publicKey.algorithm.hash.name is 'SHA-1'
 PASS keyPair.privateKey.type is 'private'
 PASS keyPair.privateKey.algorithm.name is 'RSA-OAEP'
-PASS keyPair.privateKey.algorithm.modulusLength is 2048
+PASS keyPair.privateKey.algorithm.modulusLength is 512
 PASS keyPair.privateKey.usages is ["decrypt", "unwrapKey"]
 PASS bytesToHexString(keyPair.privateKey.algorithm.publicExponent) is '010001'
 PASS keyPair.privateKey.algorithm.hash.name is 'SHA-1'
@@ -39,7 +39,7 @@ PASS bytesToHexString(Base64URL.parse(jwkPublicKey.e)) is '010001'
 Importing it back...
 PASS exportedPublicKey.type is 'public'
 PASS exportedPublicKey.algorithm.name is 'RSA-OAEP'
-PASS exportedPublicKey.algorithm.modulusLength is 2048
+PASS exportedPublicKey.algorithm.modulusLength is 512
 PASS bytesToHexString(exportedPublicKey.algorithm.publicExponent) is '010001'
 PASS exportedPublicKey.algorithm.hash.name is 'SHA-1'
 PASS exportedPublicKey.extractable is true