Fixed the multilib issue of NFS plugin.

Upgrade to 1.5.0:

• New plugin -- LibstorageMgmt NFS server plugin(nfs://).
• New plugin -- LibstorageMgmt Local Pseudo plugin(local://).
• New plugin -- LibstorageMgmt Microsemi storage plugin(arcconf://).
• Removed support of lmiwbem due to missing self-signed CA verification and inactive upstream of lmiwbem.
• Support SES actions on kernel bsg module(old code was using sg kernel module).
• Add manpages for every C API using kernel-doc.
• Using docker of Fedora and Centos for Travis CI test.
• New URI parameter ca_cert_file for ONTAP, SMI-S, targetd plugin.
• Bug fixes:
  • Fix the ONTAP SSL connection.
  • Sim plugin: Fix sqlite3 transaction of fs_child_dependency_rm().
  • MegaRAID: Handle when both perccli and storcli are installed.
  • MegaRAID plugin: Support pool status for rebuild and check.
  • Fixed C++ code compile warnings.
• Library adds:
  • Query health status of local disk: lsm_local_disk_health_status_get()/lsm.LocalDisk.health_status_get()