Fix deprecation regressions in Repository specs

Signed-off-by: Alex Coles <alex@alexbcoles.com>

spec/models/repository/git_spec.rb

@@ -149,7 +149,7 @@ describe Repository::Git, type: :model do
 
       it 'should fetch changesets incremental' do
         # Remove the 3 latest changesets
-        instance.changesets.find(:all, order: 'committed_on DESC', limit: 8).each(&:destroy)
+        instance.changesets.order('committed_on DESC').limit(8).each(&:destroy)
         instance.reload
         expect(instance.changesets.count).to eq(14)
 

spec/models/repository/subversion_spec.rb

@@ -143,7 +143,7 @@ describe Repository::Subversion, type: :model do
         instance.fetch_changesets
 
         # Remove changesets with revision > 5
-        instance.changesets.find(:all).each do |c| c.destroy if c.revision.to_i > 5 end
+        instance.changesets.each do |c| c.destroy if c.revision.to_i > 5 end
         instance.reload
         expect(instance.changesets.count).to eq(5)