Move tests out of freqtrade module

tests/testdata/pairs.json

@@ -0,0 +1,26 @@
+[
+    "ADA/BTC",
+    "BAT/BTC",
+    "DASH/BTC",
+    "ETC/BTC",
+    "ETH/BTC",
+    "GBYTE/BTC",
+    "LSK/BTC",
+    "LTC/BTC",
+    "NEO/BTC",
+    "NXT/BTC",
+    "POWR/BTC",
+    "STORJ/BTC",
+    "QTUM/BTC",
+    "WAVES/BTC",
+    "VTC/BTC",
+    "XLM/BTC",
+    "XMR/BTC",
+    "XVG/BTC",
+    "XRP/BTC",
+    "ZEC/BTC",
+    "BTC/USDT",
+    "LTC/USDT",
+    "ETH/USDT"
+]
+