docker scripts: Provide git configuration inside docker container

While kernel patching 'git am/apply' is failing with below error:
*** Please tell me who you are.

Run

  git config --global user.email "[email protected]"
    git config --global user.name "Your Name"

    to set your account's default identity.
    Omit --global to set the identity only in this repository.

Though we provide GIT_COMMITTER_{NAME/EMAL} environment, bitbake does not pass
this to do_patch tasks. This patch configures the docker container with proper
git configuration.

Signed-off-by: Amarnath Valluri <[email protected]>

docker/build-project.sh

@@ -25,6 +25,12 @@ cd $WORKSPACE
 # get git commit ID of the project for using in buildhistory tagging
 CI_GIT_COMMIT=$(git rev-parse HEAD)
 
+# prepare git config
+#NOTE: bitbake does not pass git enviornment to tasks(do_patch),
+# hence we need to setup the git configuration 
+git config --global user.name "$GIT_COMMITTER_NAME"
+git config --global user.email "$GIT_COMMITTER_EMAIL"
+
 # FIXME: undbound variables used without checking:
 set +u
 source ostro-init-build-env

docker/local-build.sh

@@ -11,6 +11,9 @@ BUILD_CACHE_DIR=$WORKSPACE/bb-cache
 BUILDOS="opensuse-42.1"
 GIT_PROXY_COMMAND=oe-git-proxy
 TARGET_MACHINE="intel-corei7-64"
+GIT_COMMITTER_EMAIL=${GIT_COMMITTER_EMAIL:-$(git config --get user.email)}
+GIT_COMMITTER_NAME=${GIT_COMMITTER_NAME:-$(git config --get user.name)}
+GIT_COMMITTER_NAME=${GIT_COMMITTER_NAME:-${USER}}
 
 BUILD_ARGS="--build-arg uid=`id -u`"
 RUN_ARGS=(-u "`id -u`")
@@ -39,7 +42,7 @@ echo "$BUILD_NUMBER" > $WORKSPACE/.build_number
 CI_BUILD_ID="${BUILD_TIMESTAMP}-build-${BUILD_NUMBER}"
 
 # export other vars
-for var in WORKSPACE BASE_DISTRO CURRENT_PROJECT BUILD_CACHE_DIR GIT_PROXY_COMMAND CI_BUILD_ID TARGET_MACHINE; do
+for var in WORKSPACE BASE_DISTRO CURRENT_PROJECT BUILD_CACHE_DIR GIT_PROXY_COMMAND CI_BUILD_ID TARGET_MACHINE GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL; do
 	RUN_ARGS+=(-e "$var=${!var}")
 done
 # Point HOME to WORKSPACE, don't polute real home.