Update moto version used in botocore tests. (#444)

* Update moto version used in botocore tests.

*  

Update moto version for py27.

Author: umaannamalai

tox.ini

@@ -217,8 +217,9 @@ deps =
     external_boto3-boto01: moto<2.0
     external_boto3-py27: rsa<4.7.1
     external_botocore: botocore
-    external_botocore: moto[awslambda,ec2,iam]<2.0
+    external_botocore-{py36,py37,py38,py39,py310}: moto[awslambda,ec2,iam]<3.0
     external_botocore-py27: rsa<4.7.1
+    external_botocore-py27: moto[awslambda,ec2,iam]<2.0
     external_feedparser-feedparser05: feedparser<6
     external_feedparser-feedparser06: feedparser<7
     external_httplib2: httplib2<1.0