Update cluster up time estimate

Author: deliahu

manager/install.sh

@@ -189,7 +189,7 @@ function create_eks() {
     fi
   fi
 
-  echo -e "￮ spinning up the cluster (this will take about 15 minutes) ...\n"
+  echo -e "￮ spinning up the cluster (this will take about 25 minutes) ...\n"
   python generate_eks.py $CORTEX_CLUSTER_CONFIG_FILE > /workspace/eks.yaml
   eksctl create cluster --timeout=$EKSCTL_TIMEOUT --install-neuron-plugin=false -f /workspace/eks.yaml
   echo

test/apis/pytorch/text-generator/README.md

@@ -47,7 +47,7 @@ Cortex can automatically provision infrastructure on your AWS account and deploy
 $ cortex cluster up
 ```
 
-This creates a Cortex cluster in your AWS account, which will take approximately 15 minutes. After your cluster is created, you can deploy to your cluster by using the same code and configuration as before:
+This creates a Cortex cluster in your AWS account, which will take approximately 25 minutes. After your cluster is created, you can deploy to your cluster by using the same code and configuration as before:
 
 ```python
 import cortex