Revert "change mesh_namelist[] value assignment from attributes and add free mesh_namelist in common_read_open_file();"

This reverts commit 2012e59a4e3be718d537a3439f9aea7254ab12a5.
Revert "chage adios_int to adios_integer"

This reverts commit bfd4a19eef8a86b20202910288959d2f76ad01d1.
Revert "change attribute ***-num from adios_double to adios_int"

This reverts commit 37092c6a42cf0663cf24cb90006ac159ce0de14f.
Revert "add nmeshes and mesh_namelist to ADIOS_FILE, used by common_read_open_file and common_read_open"

This reverts commit 870f671a3c8ff17921f630f550b0fef1d0325fba.