[BUGFIX] Remove bogus template in template analyzer

Since the implementation of #22169 a bogus template icon 
appeared in the template analyzer.
This is because the call to processTemplate was accidentally 
moved outside the if construct which checks if there are 
ext_typoscript_*.txt files for the extensions.

Change-Id: Ib3de6000df411ee4cb3bbd88f38514d5fcc6653e
Fixes: #38104
Releases: 4.6, 4.7, 6.0
Reviewed-on: http://review.typo3.org/12113
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Susanne Moog
Tested-by: Susanne Moog