tests: use 'legacy.exchange' option in various mixed tests

The new option will stay around. The experimental option was only meant to be
temporary. We update various tests that validate both bundle1 and bundle2
version side by side. This changeset only takes care of enforcing bundle1. The
other use of 'experimental.bundle2-exp=True' will be taken care of in the next
changeset.

tests/test-bookmarks-pushpull.t

@@ -832,7 +832,7 b' Using ssh'
   $ hg -R ../issue4455-dest/ bookmarks
   no bookmarks set
 
-  $ hg push -B @ ssh --config experimental.bundle2-exp=False
+  $ hg push -B @ ssh --config devel.legacy.exchange=bundle1
   pushing to ssh://user@dummy/issue4455-dest
   searching for changes
   no changes found
@@ -855,7 +855,7 b' Using http'
   $ hg -R ../issue4455-dest/ bookmarks
   no bookmarks set
 
-  $ hg push -B @ http --config experimental.bundle2-exp=False
+  $ hg push -B @ http --config devel.legacy.exchange=bundle1
   pushing to http://localhost:$HGPORT/
   searching for changes
   no changes found

tests/test-phases-exchange.t

@@ -1050,7 +1050,7 b' same over the wire'
 
 enforce bundle1
 
-  $ hg pull http://localhost:$HGPORT/ --config experimental.bundle2-exp=False
+  $ hg pull http://localhost:$HGPORT/ --config devel.legacy.exchange=bundle1
   pulling from http://localhost:$HGPORT/
   searching for changes
   no changes found

tests/test-pull-http.t

@@ -52,7 +52,7 b' expect error, cloning not allowed'
   requesting all changes
   abort: authorization failed
   [255]
-  $ hg clone http://localhost:$HGPORT/ test4 --config experimental.bundle2-exp=False
+  $ hg clone http://localhost:$HGPORT/ test4 --config devel.legacy.exchange=bundle1
   abort: authorization failed
   [255]
   $ killdaemons.py

tests/test-push-hook-lock.t

@@ -26,7 +26,7 b''
   $ echo bar >> 3/foo
   $ hg --cwd 3 ci -m bar
 
-  $ hg --cwd 3 push ../2 --config experimental.bundle2-exp=False
+  $ hg --cwd 3 push ../2 --config devel.legacy.exchange=bundle1
   pushing to ../2
   searching for changes
   adding changesets

tests/test-subrepo.t

@@ -1529,7 +1529,7 b' Courtesy phases synchronisation to publi'
   > [paths]
   > default=../issue3781-dest/
   > EOF
-  $ hg push --config experimental.bundle2-exp=False
+  $ hg push --config devel.legacy.exchange=bundle1
   pushing to $TESTTMP/issue3781-dest (glob)
   pushing subrepo s to $TESTTMP/issue3781-dest/s
   searching for changes