"pipe update" for one-folder distribution

[ekazachkova]

Implements issue #589 for Linux for folder distributive

Since build_linux.sh builds one-file and one-folder distributive at the same time we should consider this behavior during update operation. To determine the type of distribution we use build.info file which contains such information.

• if this file contains one-file string Cloud Pipeline CLI will update current executable file
• if this file contains one-folder string Cloud Pipeline CLI will update corresponding folder:

1. downloads pipe.tar.gz from Cloud Pipeline API into temporary folder ~.pipe/tmp
2. extracts it into temporary folder ~.pipe/tmp
3. removes all under folder with executable files and copies extracted files into it

• if build.info file does not exists Cloud Pipeline CLI will update as in case with single executable file
• if build.info file exists but contains string that is different from one-file or one-folder values an error will be occurred.

[ekazachkova]

Added support for el6 Linux distros:

• if bundle.info file does not exists Cloud Pipeline CLI will be updated as in case with not centos6 dist
• if bundle.info contains centos:6 as second line Cloud Pipeline CLI will be updated for el6 linux distr
• in other cases Cloud Pipeline CLI works as before @sidoruka could you check this changes?