[openwrt_ap] Refactored to use yaml safe loading mechanism

The yaml full loading mechanism is powerful but very insecure to allow executing arbitrary python code
including calls to os.system lib to execute any command on your system.
This change refactored to use safe loading mechanism yaml.load(content,Loader=SafeLoader)

Bug: 218592912
Bug: 203498915
Test: WifiRoamingTest:test_connect_to_wpa2_psk_2g_80211r
      WifiRoamingTest:test_connect_to_wpa2_psk_5g_80211r
      WifiWpaPersonalTest
      WifiWpa2PersonalTest
Change-Id: I3988fcd231a0cc6cd24879f7f5e562028182deb0
1 file changed
tree: 4094654aaa261714abdf716239e659b5db08b004
  1. acts/
  2. acts_tests/
  3. tools/
  4. wts-acts/
  5. Android.mk
  6. LICENSE
  7. OWNERS
  8. PREUPLOAD.cfg