Adding a counter to the dependencies cache

The cache needed to be cleared due to an issue presented when the
source for one dependency moved from one place to another. To
accomplish this we add a counter. This is similar to the recommendation
in the CircleCI documentation on caching

Closes #8184

Signed-off-by: Matt Farina <matt@mattfarina.com>

.circleci/config.yml

@@ -13,13 +13,13 @@ jobs:
           version: 18.06.0-ce
       - restore_cache:
           keys:
-            - glide-{{ checksum "glide.yaml" }}-{{ checksum "glide.lock" }}
+            - glide-2-{{ checksum "glide.yaml" }}-{{ checksum "glide.lock" }}
-            - glide- # used as a fall through if the checksum fails to find exact entry
+            - glide-2- # used as a fall through if the checksum fails to find exact entry
       - run:
           name: install dependencies
           command: .circleci/bootstrap.sh
       - save_cache:
-          key: glide-{{ checksum "glide.yaml" }}-{{ checksum "glide.lock" }}
+          key: glide-2-{{ checksum "glide.yaml" }}-{{ checksum "glide.lock" }}
           paths:
             - /root/.glide  # Where the glide cache is stored
       - run: