Move setup tests to a single test

Initially setup tests were run once per each integration test. This
makes it run only once

Author: sanket1729

tests/setup/mod.rs

@@ -22,8 +22,3 @@ pub fn setup() -> BitcoinD {
     );
     bitcoind
 }
-
-#[test]
-fn test_setup() {
-    setup();
-}

tests/test_cpp.rs

@@ -239,6 +239,11 @@ pub fn test_from_cpp_ms(cl: &Client, testdata: &TestData) {
     }
 }
 
+#[test]
+fn test_setup() {
+    setup::setup();
+}
+
 #[test]
 fn tests_from_cpp() {
     let cl = &setup::setup().client;