Added more functional tests, fix bugs discovered.

* Fixed the formatting of command line logging of strawboss workers.
* Fixed a bug in the (de)serialization of log levels in the strawboss service
  config file.
* Pulled `parseBuildStatus` logic out of `loadBuildStatus` so that we could
  parse a JSON that didn't come from a file.
* Added `parseRun` for Run objects.
* Moved `/ping` to `/service/debug/ping` for symmetry with
  `/service/debug/stop`
* Added functional tests of full builds.

src/test/nim/testutil.nim

@@ -1,4 +1,7 @@
-import httpclient, json, strutils
+import httpclient, json, os, strutils, times
+
+import ../../main/nim/strawbosspkg/core
+import ../../main/nim/strawbosspkg/configuration
 
 proc newAuthenticatedHttpClient*(apiBase, uname, pwd: string): HttpClient =
   result = newHttpClient()
@@ -6,4 +9,38 @@ proc newAuthenticatedHttpClient*(apiBase, uname, pwd: string): HttpClient =
   assert authResp.status.startsWith("200")
   result.headers = newHttpHeaders({"Authorization": "Bearer " & parseJson(authResp.body).getStr})
 
+proc waitForBuild*(client: HttpClient, apiBase, projectName, runId: string,
+                         expectedState = BuildState.complete,
+                         failedState = BuildState.failed,
+                         timeout = 10): Run =
 
+  let startTime = epochTime()
+  var run: Run
+
+  #echo "Waiting for '" & $expectedState & "' from run:\n\t" &
+  #  apiBase & "/project/" & projectName & "/run/" & runId
+
+  while true:
+    var curElapsed = epochTime() - startTime
+
+    #echo "Checking (" & $curElapsed & " has passed)."
+
+    if curElapsed > toFloat(timeout):
+      raise newException(SystemError, "Timeout exceeded waiting for build.")
+
+    let resp = client.get(apiBase & "/project/" & projectName & "/run/" & runId)
+
+    #echo "Received resp:\n\n" & $resp.status & "\n\n" & $resp.body
+
+    if not resp.status.startsWith("200"):
+      raise newException(IOError, "Unable to retrieve status. Received response: " & resp.body)
+
+    run = parseRun(parseJson(resp.body))
+
+    if run.status.state == failedState:
+      raise newException(IOError, "Run transitioned to failed state '" & $failedState & "'")
+
+    if run.status.state == expectedState:
+      return run
+
+    sleep(200)