travis-ci use PX4_DOCKER for builds and specify tag

.travis.yml

@@ -11,7 +11,7 @@ matrix:
   include:
     - os: linux
       sudo: required
-      env: GCC_VER=5.4 DOCKER_REPO="px4io/px4-dev-nuttx:2016-12-26"
+      env: GCC_VER=5.4 DOCKER_REPO="px4io/px4-dev-nuttx:2017-01-01"
       services:
         - docker
     - os: osx
@@ -64,7 +64,7 @@ env:
 script:
   - ccache -M 1GB; ccache -z
   - if [ "${TRAVIS_OS_NAME}" = "linux" ]; then
-      docker run --rm -v `pwd`:`pwd`:rw -v $HOME/.ccache:$HOME/.ccache:rw -e CCACHE_DIR=$HOME/.ccache -e CI=true -e GIT_SUBMODULES_ARE_EVIL=1 -w=`pwd` -e LOCAL_USER_ID=$UID -it ${DOCKER_REPO} /bin/bash -c "make check_qgc_firmware VECTORCONTROL=0";
+      PX4_DOCKER=1 make check_qgc_firmware;
     elif [ "${TRAVIS_OS_NAME}" = "osx" ]; then
       make tests;
     fi

Makefile

@@ -97,7 +97,7 @@ SRC_DIR := $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))
 
 # optionally run commmands in PX4 docker
 ifdef PX4_DOCKER
-	PX4_RUN = docker run -it --rm -v $(SRC_DIR):$(SRC_DIR):rw -w $(SRC_DIR) -v /tmp/.X11-unix:/tmp/.X11-unix:ro -v $(HOME)/.ccache:$(HOME)/.ccache:rw -e CCACHE_DIR=$(HOME)/.ccache -e LOCAL_USER_ID=`id -u $(USER)` px4io/px4-dev-nuttx /bin/bash -c "$1"
+	PX4_RUN = docker run -it --rm -v $(SRC_DIR):$(SRC_DIR):rw -w $(SRC_DIR) -v /tmp/.X11-unix:/tmp/.X11-unix:ro -v $(HOME)/.ccache:$(HOME)/.ccache:rw -e CCACHE_DIR=$(HOME)/.ccache -e LOCAL_USER_ID=`id -u $(USER)` px4io/px4-dev-nuttx:2017-01-01 /bin/bash -c "$1"
 else
 	PX4_RUN = $1
 endif

src/firmware/posix/CMakeLists.txt

@@ -141,7 +141,7 @@ install(DIRECTORY ${PROJECT_SOURCE_DIR}/posix-configs DESTINATION ${CMAKE_INSTAL
 # tests
 #
 
-#T ODO: find a way to keep this in sync with tests_main
+# TODO: find a way to keep this in sync with tests_main
 set(tests
 	autodeclination
 	bson