From: @tiancixiao
Reviewed-by: @liucunwei,@heleiwang
Signed-off-by: @liucunwei

From: @zhaozhenlong
Reviewed-by: 
Signed-off-by:

From: @ling_qiao_min
Reviewed-by: @zhang_xue_tong,@zhanghaibo5
Signed-off-by: @zhang_xue_tong

From: @huangbo77
Reviewed-by: @wuxuejian,@kisnwang
Signed-off-by: @wuxuejian

From: @xulei2020
Reviewed-by: @pandoublefeng,@liucunwei
Signed-off-by: @pandoublefeng

From: @peilin-wang
Reviewed-by: @tom__chen,@mikef
Signed-off-by: @mikef

From: @hfarahat
Reviewed-by: 
Signed-off-by:

From: @david-he91
Reviewed-by: @liangchenghui,@ljl0711
Signed-off-by: @liangchenghui

From: @shibeiji
Reviewed-by: @guoqi1024,@c_34,@linqingke
Signed-off-by:

From: @wilfchen
Reviewed-by: @limingqi107,@cristoval
Signed-off-by: @cristoval

From: @ling_qiao_min
Reviewed-by: 
Signed-off-by:

From: @wilfchen
Reviewed-by: @cristoval,@limingqi107
Signed-off-by: @limingqi107

From: @yeyunpeng2020
Reviewed-by: 
Signed-off-by:

From: @irmo
Reviewed-by: @zhoufeng54,@kisnwang
Signed-off-by: @jjfeing

From: @laiyongqiang
Reviewed-by: @kisnwang
Signed-off-by:

From: @lzkcode
Reviewed-by: 
Signed-off-by:

From: @wanyiming
Reviewed-by: @c_34,@wuxuejian
Signed-off-by: @wuxuejian

From: @heleiwang
Reviewed-by: @liucunwei
Signed-off-by: @liucunwei

From: @yangruoqi713
Reviewed-by: @zhanghaibo5,@hangangqiang
Signed-off-by: @zhanghaibo5

From: @xiaoda_zh
Reviewed-by: @stsuteng,@kisnwang
Signed-off-by: @stsuteng

From: @zhangzhewei01
Reviewed-by: 
Signed-off-by:

From: @hangangqiang
Reviewed-by: @zhanghaibo5,@ddwsky
Signed-off-by: @zhanghaibo5

From: @luopengting
Reviewed-by: 
Signed-off-by:

From: @yuchaojie
Reviewed-by: @kingxian,@c_34
Signed-off-by: @kingxian

From: @he-botao
Reviewed-by: 
Signed-off-by:

From: @wangshuide2020
Reviewed-by: @liangchenghui,@ljl0711
Signed-off-by: @liangchenghui

From: @fuzhiye
Reviewed-by: @zhang_xue_tong
Signed-off-by:

From: @tronzhang
Reviewed-by: @gaoxiong1,@ckey_dou
Signed-off-by: @ckey_dou

1. add env_config_path for ms_context
2. add EnvConfigParser to parse config
3. add in CMakeLists
4. clang-format, cpplint
5. fix spelling in ms_context

Use EnvConfigParser in the constructed function of base_recorder,
when a recorder is initialized, its direcctory will be set as the
value from config file. In addition, recorder_manager will get the
'enable' from config file. If 'enable' is true and the path is not a
valid value, it will be the default value: './rdr'.