FIX: Name iternode/joinnode something unique

There is a bug deep within nipype workflow connection / join expansions that either:
- mistakenly uses node.name rather than node._hierarchy to fetch the relevant node or
- reuses a previous JoinNode's `_next_slot_index`

In either case, the end result is some funky indexed connection (in this case it was looking for the fields `bold_fsLRJ3` and `bold_fsLRJ4`.

I spent some time in the rabbit hole and came out empty-handed, but the easiest solution seems to be just renaming them to something unique. Pain.

Author: mgxd

nibabies/workflows/bold/resampling.py

@@ -496,10 +496,10 @@ def init_bold_fsLR_resampling_wf(
         .. workflow::
             :graph2use: colored
             :simple_form: yes
-            from fmriprep.workflows.bold.resampling import init_bold_fsLR_resampling_wf
+            from nibabies.workflows.bold.resampling import init_bold_fsLR_resampling_wf
             wf = init_bold_fsLR_resampling_wf(
                 estimate_goodvoxels=True,
-                grayord_density='92k',
+                grayord_density='91k',
                 omp_nthreads=1,
                 mem_gb=1,
             )
@@ -571,14 +571,14 @@ def init_bold_fsLR_resampling_wf(
 
     itersource = pe.Node(
         niu.IdentityInterface(fields=['hemi']),
-        name='itersource',
+        name='bold_fslr_itersource',
         iterables=[('hemi', ['L', 'R'])],
     )
 
     joinnode = pe.JoinNode(
         niu.IdentityInterface(fields=['bold_fsLR']),
-        name='joinnode',
-        joinsource='itersource',
+        name='bold_fslr_joinnode',
+        joinsource='bold_fslr_itersource',
     )
 
     outputnode = pe.Node(