Add license_finder gem to omnibus group

Signed-off-by: Balasankar "Balu" C <balasankar@gitlab.com>

Gemfile

@@ -387,7 +387,6 @@ group :development, :test do
 
   gem 'benchmark-ips', '~> 2.3.0', require: false
 
-  gem 'license_finder', '~> 5.4', require: false
   gem 'knapsack', '~> 1.17'
 
   gem 'stackprof', '~> 0.2.10', require: false
@@ -397,6 +396,11 @@ group :development, :test do
   gem 'timecop', '~> 0.8.0'
 end
 
+# Gems required in omnibus-gitlab pipeline
+group :development, :test, :omnibus do
+  gem 'license_finder', '~> 5.4', require: false
+end
+
 group :test do
   gem 'shoulda-matchers', '~> 4.0.1', require: false
   gem 'email_spec', '~> 2.2.0'