Fix up valgrind memcheck after GPFS handle key was changed

Ported from 1.5.x: add8058bd3680708d4b1bc6cda5806555083a191

Signed-off-by: Frank Filz <ffilz@us.ibm.
Signed-off-by: Allison Henderson <achender@vnet.linux.ibm.com>
Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
Fix return code from cache_inode_commit

Normally somehow this doesn't cause a problem, but under certain
memory situations, the problem was exposed. Fix is clear from
code inspection...

Ported from 1.5.x: de92d1999d5b7ef11ae50510cce009749a9cbcb6

Signed-off-by: Allison Henderson<achender@linux.vnet.ibm.com>
Signed-off-by: Frank Filz <ffilz@us.ibm.com>
Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
If lookup fails and error is not CACHE_INODE_NOT_FOUND, return
immediately.

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Changed src/Docs/15to20-porting.txt according to the ported patches.

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Strip Old API GPFS Files

Signed-off-by: Frank S. Filz <ffilz@us.ibm.com>