Enable RSpec profiling only if RSPEC_PROFILING_POSTGRES_URL is not empty

Signed-off-by: Rémy Coutable <remy@rymai.me>

config/initializers/rspec_profiling.rb

@@ -32,7 +32,7 @@ end
 if Rails.env.test?
   RspecProfiling.configure do |config|
-    if ENV['RSPEC_PROFILING_POSTGRES_URL']
+    if ENV['RSPEC_PROFILING_POSTGRES_URL'].present?
       RspecProfiling::Collectors::PSQL.prepend(RspecProfilingExt::PSQL)
       config.collector = RspecProfiling::Collectors::PSQL
     end

spec/spec_helper.rb

@@ -10,7 +10,7 @@ require 'shoulda/matchers'
 require 'rspec/retry'
 rspec_profiling_is_configured =
-  ENV['RSPEC_PROFILING_POSTGRES_URL'] ||
+  ENV['RSPEC_PROFILING_POSTGRES_URL'].present? ||
   ENV['RSPEC_PROFILING']
 branch_can_be_profiled =
   ENV['GITLAB_DATABASE'] == 'postgresql' &&