Avoid crash in NodeRepository.

- The crash was happening due to an unhandled exception, the problem was that the statement that was raising an exception was out of the try/catch block.

app/src/main/java/cy/agorise/bitsybitshareswallet/repositories/NodeRepository.kt

@@ -86,8 +86,8 @@ class NodeRepository(private val nodeDao: NodeDao) {
         val updatePeriod = Constants.NODES_UPDATE_PERIOD
         // Verify if nodes list should be updated
         if (now - updatePeriod > lastUpdate) {
-            val response = mBitsyWebservice?.getNodes()
             try {
+                val response = mBitsyWebservice?.getNodes()
                 // Update the list of nodes only if we got at least MIN_NODES_SIZE nodes
                 if (response?.isSuccessful == true && (response.body()?.size ?: 0) >= MIN_NODES_SIZE) {
                     val nodesWS = response.body() ?: return