Docs: Merge EE doc/analytics to CE

doc/analytics/README.md

+---
+redirect_to: 'https://docs.gitlab.com/ee/user/group/index.html#user-contribution-analysis-starter'
+---
+
+This document was moved to [another location](https://docs.gitlab.com/ee/user/group/index.html#user-contribution-analysis-starter)

doc/analytics/contribution_analytics.md

+---
+redirect_to: 'https://docs.gitlab.com/ee/user/group/contribution_analytics/index.html'
+---
+
+This document was moved to [another location](https://docs.gitlab.com/ee/user/group/contribution_analytics/index.html).

scripts/lint-doc.sh

@@ -35,7 +35,7 @@ fi
 
 # Do not use 'README.md', instead use 'index.md'
 # Number of 'README.md's as of 2018-03-26
-NUMBER_READMES_CE=43
+NUMBER_READMES_CE=44
 NUMBER_READMES_EE=46
 FIND_READMES=$(find doc/ -name "README.md" | wc -l)
 echo '=> Checking for new README.md files...'