Move hadoop_fedora/post-install.d/* to .../install.d

Implements: blueprint merge-dib-hadoop-elements
Change-Id: Iae2ce65a311c7b7ba4bf8d63920ba9bcd6be814a
Merge first-boot, setup-hadoop and setup-ssh with distro switching based on lsb_release

Implements: blueprint merge-dib-hadoop-elements
Change-Id: I5090a556471414cfd663fa07a0efec2ff94c3581
Make 40-setup-ssh always exit with success

Implements: blueprint merge-dib-hadoop-elements
Change-Id: I15cbfa550fe27271f6f8c93b8f5190d31642c9f0
Allow installing augeas and openssh-client on both Fedora and Ubuntu

Change-Id: I00c297eb07b559c61fe0f1abf1370e42a93dba75
Implements: blueprint merge-dib-hadoop-elements