Modified indenting to affect injected code only
pom_editor.sh: now respects indent of the input
Inject dependencies node when calling add_dep_mgmt

dependencyManagement section should have dependencies tag below it, not
depencency tags themselves. This patch adds depencencies tag when needed

Patch provided by Matt Spaulding
ref: https://bugzilla.redhat.com/show_bug.cgi?id=998322
pom_editor.sh: now ignores whitespace in GAID matching
pom_editor.sh: trimmed whitespace in inserted comments