Fix I2530 java version checks (#2916)

Author: kddejong

src/cfnlint/rules/resources/lmbd/SnapStartEnabled.py

@@ -26,7 +26,7 @@ def validate(self, runtime, path):
         if not isinstance(runtime, str):
             return []
 
-        if not (runtime.startswith("java")) and runtime not in ["java8.al2", "java8"]:
+        if not (runtime.startswith("java")) or runtime in ["java8.al2", "java8"]:
             return []
 
         return [

test/fixtures/templates/good/resources/lambda/snapstart-enabled.yaml

@@ -39,3 +39,16 @@ Resources:
         ApplyOn: None
       TracingConfig:
         Mode: Active
+
+  FunctionJava8:
+    Type: AWS::Lambda::Function
+    Properties:
+      Handler: index.handler
+      Role: !GetAtt LambdaRole.Arn
+      ReservedConcurrentExecutions: 20
+      Code:
+        S3Bucket: my-bucket
+        S3Key: function.zip
+      Runtime: java8
+      TracingConfig:
+        Mode: Active