using edx github mirror for edxapp

playbooks/roles/edxapp/defaults/main.yml

@@ -273,11 +273,11 @@ worker_core_mult:
 #To turn off theming, specify edxapp_theme_name: ''
 #Stanford, for example, uses edxapp_theme_name: 'stanford'
 edxapp_theme_name: ''
-edxapp_theme_source_repo: 'https://github.com/Stanford-Online/edx-theme.git'
+edxapp_theme_source_repo: 'https://git.edx.org/Stanford-Online/edx-theme.git'
 edxapp_theme_version: 'HEAD'
 
 # make this the public URL instead of writable
-edx_platform_repo: https://github.com/edx/edx-platform.git
+edx_platform_repo: https://git.edx.org/edx/edx-platform.git
 # `edx_platform_commit` can be anything that git recognizes as a commit
 # reference, including a tag, a branch name, or a commit hash
 edx_platform_commit: 'release'