Builder Enhancements

[npanpaliya]

1. Docker build images should have newer conda-build and conda versions
2. output_folder should be indexed even if no package is built in it
   Description:
   When no package is built but conda env files are generated using remote channels, the output_folder remains empty but is listed in the conda env file as a channel. So, even that empty output_folder should be conda indexed to be detected as a right channel, otherwise using conda env file gives error.
3. open-ce-common-utils.sh script doesn't work with --container_build option
4. Support --build_ffmpeg and --fips with --container_build option