Fix memcache sample
Fix memcache sample

Change-Id: Ie8265ffe645c894ce7111e788e07e7497c4d3dce

sharbison3/python-docs-samples,GoogleCloudPlatform/python-docs-samples,GoogleCloudPlatform/python-docs-samples,sharbison3/python-docs-samples,canglade/NLP,canglade/NLP,hashems/Mobile-Cloud-Development-Projects,canglade/NLP,JavaRabbit/CS496_capstone,GoogleCloudPlatform/python-docs-samples,JavaRabbit/CS496_capstone,hashems/Mobile-Cloud-Development-Projects,JavaRabbit/CS496_capstone,BrandonY/python-docs-samples,GoogleCloudPlatform/python-docs-samples,canglade/NLP,sharbison3/python-docs-samples,BrandonY/python-docs-samples,JavaRabbit/CS496_capstone,BrandonY/python-docs-samples,hashems/Mobile-Cloud-Development-Projects,hashems/Mobile-Cloud-Development-Projects,BrandonY/python-docs-samples,sharbison3/python-docs-samples