feat(deploy): Simplifies deploy overview (#508)

This simplifies the deploy overview, to only show 3 version fields:
- CURRENT DEPLOYMENT
- CURRENT ENV
- NEW DEPLOYMENT

It also fixes a few errors around version detection

Reviewed-on: toolshed/abra#508
Co-authored-by: p4u1 <p4u1_f4u1@riseup.net>
Co-committed-by: p4u1 <p4u1_f4u1@riseup.net>

tests/integration/helpers/git.bash

@@ -38,6 +38,8 @@ _set_git_author() {
 }
 
 _git_commit() {
+  _set_git_author
+
   run git -C "$ABRA_DIR/recipes/$TEST_RECIPE" add .
   assert_success