Environment variables lost in context_in

[FlorianPO]

Under certain conditions, environment variables set in context_in can be lost.

This is fine ($test_var is known) :

setup:
  - first_step:
    - bloc1:
      - exec_in: export test_var="test"
      - exec_in: echo $test_var

This is not fine ($test_var is unknown) :

setup:
  - first_step:
    - bloc1:
      - exec_in: export test_var="test"
    - bloc2:
      - exec_in: echo $test_var

This could be related to #64

[FlorianPO]

This can also happen with the out_context