Fix parsing size from lvs output

lvs prints 2.5G as 2.50g. This makes puppet try to extend the lv if you ensure a volume with size of 2.5g.
lvextend complains because of the same size and fails, breaking the puppet apply.

This commit strips zeros from floating point values from lvs ouptut.

Author: felixb

lib/puppet/provider/logical_volume/lvm.rb

@@ -148,7 +148,7 @@ def size
             if $2.to_i == 00
                 return $1 + unit.capitalize
             else
-                return $1 + '.' + $2 + unit.capitalize
+                return $1 + '.' + $2.sub(/0+$/, '') + unit.capitalize
             end
         end
     end

spec/unit/puppet/provider/logical_volume/lvm_spec.rb

@@ -27,6 +27,15 @@
     end
   end
 
+  describe 'when inspecting' do
+    it "strips zeros from lvs output" do
+      @resource.expects(:[]).with(:name).returns('mylv').at_least_once
+      @resource.expects(:[]).with(:volume_group).returns('myvg').at_least_once
+      @resource.expects(:[]).with(:size).returns('2.5g').at_least_once
+      @provider.expects(:lvs).with('--noheading', '--unit', 'g', '/dev/myvg/mylv').returns(' 2.50g').at_least_once
+      expect(@provider.size).to eq('2.5G')
+    end
+  end
   describe 'when creating' do
     context 'with size' do
       it "should execute 'lvcreate' with a '--size' option" do