Move Icelandic symbol after the amount (RubyMoney#929)

* Move Icelandic symbol after the digits

* Update tests for ISK. Move unit from front to back

kr300 -> 300 kr.

config/currency_iso.json

@@ -1019,11 +1019,11 @@
     "priority": 100,
     "iso_code": "ISK",
     "name": "Icelandic Króna",
-    "symbol": "kr",
+    "symbol": "kr.",
     "alternate_symbols": ["Íkr"],
     "subunit": null,
     "subunit_to_unit": 1,
-    "symbol_first": true,
+    "symbol_first": false,
     "html_entity": "",
     "decimal_mark": ",",
     "thousands_separator": ".",

spec/money/formatting_spec.rb

@@ -126,7 +126,7 @@
 
     context "with overridden i18n settings" do
       it "should respect explicit overriding of thousands_separator/delimiter when decimal_mark/separator collide and there’s no decimal component for currencies that have no subunit" do
-        expect(Money.new(300_000, 'ISK').format(thousands_separator: ".", decimal_mark: ',')).to eq "kr300.000"
+        expect(Money.new(300_000, 'ISK').format(thousands_separator: ".", decimal_mark: ',')).to eq "300.000 kr."
       end
 
       it "should respect explicit overriding of thousands_separator/delimiter when decimal_mark/separator collide and there’s no decimal component for currencies with subunits that drop_trailing_zeros" do
@@ -474,7 +474,7 @@
         before { Money.use_i18n = false }
 
         it "should respect explicit overriding of thousands_separator/delimiter when decimal_mark/separator collide and there’s no decimal component for currencies that have no subunit" do
-          expect(Money.new(300_000, 'ISK').format(thousands_separator: ",", decimal_mark: '.')).to eq "kr300,000"
+          expect(Money.new(300_000, 'ISK').format(thousands_separator: ",", decimal_mark: '.')).to eq "300,000 kr."
         end
 
         it "should respect explicit overriding of thousands_separator/delimiter when decimal_mark/separator collide and there’s no decimal component for currencies with subunits that drop_trailing_zeros" do