Run all the soledad bootstrap on error.

Before this fix, if the soledad bootstrapping failed during the first
download process, we retried since after that point which caused a
failure.

To reproduce the problem before and after this fix you can use this diff:

```diff
diff --git a/src/leap/bitmask/services/soledad/soledadbootstrapper.py b/src/leap/bitmask/services/soledad/soledadbootstrapper.py
index 7aa86a0..b7ee646 100644
--- a/src/leap/bitmask/services/soledad/soledadbootstrapper.py
+++ b/src/leap/bitmask/services/soledad/soledadbootstrapper.py
@@ -159,6 +159,8 @@ class SoledadBootstrapper(AbstractBootstrapper):

         self._soledad_retries = 0

+        self._fake_exc = True
+
     @property
     def keymanager(self):
         return self._keymanager
@@ -453,6 +455,9 @@ class SoledadBootstrapper(AbstractBootstrapper):
         """
         Download the Soledad config for the given provider
         """
+        if self._fake_exc:
+            self._fake_exc = False
+            raise Exception("Fake problem")

         leap_assert(self._provider_config,
                     "We need a provider configuration!")
```