git: ignore 'rebase' attribute on inline switches

This attribute has no affect on the viability of an inline SCM switch.

pym/bob/scm/git.py

@@ -547,7 +547,7 @@ def canSwitch(self, oldScm):
         # Filter irrelevant properties
         diff -= {"sslVerify", 'singleBranch', 'shallow',
                 'shallowSubmodules', "useBranchAndCommit",
-                "references", "dissociate", "retries"}
+                "references", "dissociate", "retries", "rebase"}
 
         diff = set(prop for prop in diff if not prop.startswith("remote-"))